Vietnamese Volleyball's Biggest Gap Isn't a Star Spiker, It's Public Data

In a national volleyball championship semifinal I watched from the technical area, the score was 23-22 in the third set. The decisive rally: an outside hitter attacked, the ball touched the block and bounced out of bounds. The head referee called a blocking fault and gave the point to the attacking side. The other team raised a hand to request a challenge. The whole arena turned toward the big screen. The screen showed nothing at all, because this match had no video challenge system. The referee walked down, wrote the report, and kept the decision. After the final whistle, no one — including me, sitting less than ten metres from the net — could say for certain whose hand the ball touched first. The only thing left was the scorer's book, and it was not open for anyone to see. I have spent thirteen years reviewing discipline and monitoring referees, most of that time tied to volleyball. The daily work is reading reports back, checking them against the rulebook, working out which decision was right and which was wrong. The more I do it, the more I notice something that appears in no rulebook at all: most disputes in Vietnamese volleyball cannot be settled with evidence, simply because the evidence does not exist. The video challenge system was introduced by the FIVB at the 2026 World League, and it is present at almost every major event: the Volleyball Nations League, the World Championship, the Olympic Games. Each team gets two challenges per set; a successful challenge is retained, a failed one is lost. At those events, a touch on the block, a foot over the three-metre line, a serve clipping the line can all be replayed from several angles, and the referee corrects the call within seconds. In our national league, that system appears only in a handful of selected matches, usually semifinals or finals with live television. For the rest of the season, referees judge by naked eye, and nothing is preserved except the set scores. The SEA V.League — where Vietnam's women's national team plays every year — has not applied video challenge in every match either. We are running a sport in which most of its data evaporates the moment the whistle blows. This is the part I want to give the most space to, because it is the root of every other problem. Consider what a professional volleyball system is obliged to measure. For an outside hitter: spike success rate, attack efficiency after errors are subtracted, points per set. For a middle blocker: successful blocks per set, block-touch rate. For a setter: distribution rate by zone. For a libero: perfect-pass rate, dig rate. For the team as a whole: the ratio between service aces and service errors. In thirteen years of watching, I have never seen a full statistical table like that published for a Vietnamese national league season. A few outlets count points for standout players, but that is points scored, not efficiency. An outside hitter who scores 20 points from 60 swings is a very different story from one who scores 20 from 35. Without a denominator, the number says nothing. Based on my experience tracking matches, the consequences run in a chain. Coaches have no basis for comparing the squad internally — who is improving, who has stalled — so substitutions tend to rest on instinct. Foreign scouts who want to assess Vietnamese players have no source to consult, so opportunities abroad depend on word of mouth. Fans argue with one another through emotion, because no two of them share the same set of numbers. In Japan, the V.League publishes detailed statistics for every player after each round, including attack efficiency by set. In Thailand, the national league has its own statistics department, and the national team is fed by exactly that data. We do not lose to them in crowd passion. We lose in the recording stage. Missing data also changes the way referees themselves work. Without video, a referee must decide by a sense of position — something easily distorted by the speed of the rally and the roar of the crowd. I once reviewed a full season's numbers and found that card rates shifted with crowd density, even though the rules had not changed by a single word. That does not mean referees are biased. It only means that when ears and eyes are the only tools, the surrounding environment becomes part of the verdict. The curious thing is that the video challenge itself is the best instrument for measuring referees. If a league published each referee's challenge-success rate, people would know who calls with a steady hand and who is often overruled. No league in Vietnam does that, so a referee's reputation is protected only by belief, and belief does not last. And this is where I want to be blunt: the biggest problem in Vietnamese volleyball today is not the absence of a world-class outside hitter, but the absence of a public data system. We have Trần Thị Thanh Thúy, a captain who has played in Japan and South Korea; we have Nguyễn Thị Bích Tuyền, with one of the hardest spikes in the region. But when those two take the court, no one — not even the opposing coaching staff — has a reliable table showing how efficiently they are attacking, from which zone, at which point of the match. Every analysis stops at the level of impression, and impression cannot correct a mistake. A volleyball system that wants to go far must answer very dry questions: what percentage of our outside hitter's attacks succeed against a block standing over two metres? What percentage of hard-driven attacks does our libero dig? In the fifth set, when stamina runs out, by how much does the service-error rate rise? Without data, all of these questions reduce to faith. The familiar reaction after every home defeat is to blame the referee. I understand the feeling, but seen from outside the door, the referee is the most convenient excuse for a hole that sits much deeper. We demand absolute accuracy from referees while giving them no tool for accuracy. We demand consistent calls while the league itself is inconsistent from the very question of which match has video and which does not. I was thrown out for reading the rulebook correctly. Fortunately, some things can only be seen clearly from outside the door. Standing outside, I see something those on the inside tend to miss: referees are not the cause of the inconsistency, they are the ones who carry its consequences. With no crowd in the stands, I saw referees tremble. Not from pressure, but from a lack of actors to perform for. When the roar disappears, people finally notice what referees are judging with — and sometimes the answer makes everyone go quiet. When a camera turns on a rally, I do not argue. I let the image testify. The problem is that in most Vietnamese volleyball matches, there is no camera close enough to testify for anyone. The rules do not feed people, but people feed the rules with model rallies. A book published after every match — spike rate, block count, perfect-pass rate, number of challenges — will not make any team stronger overnight. But it turns every dispute from a place of "I saw it" into a place of "the numbers say so". That is the first step, and the only one that cannot be skipped.