Midfielder Nguyen Quang Hai opened the score for Vietnam at the 20th minute, while the second goal was earned by team captain Nguyen Van Quyet near the end of the first half.
Nguyen Cong Phuong made a goal at the 73rd minute to settle a 3-0 victory for the Vietnamese squad. The midfielder previously failed twice to score from penalty kicks.
With the victory, Vietnam takes the lead in Group D with three points, earning them a greater chance to qualify for the next phase.
The team will face Nepal on August 16 and then Japan on August 19.
The men’s football will finish on September 1. It will feature 26 teams in two groups of five and four groups of four. The top two teams from each group and the four best third-place teams will advance to the second round.