The game was also a rematch between the two teams in the championship and Thailand managed to get revenge after they lost Vietnam 2-0 in a group match last week.
Vietnam started offensive play from the first few minutes when striker Hai Yen launched a 30m cannon towards goal, but it sailed over the bar.
However, Thailand took the lead with a goal in the eighth minute.
In an effort to play the ball out from Thailand’s corner kick, Vietnamese defender Chuong Thi Kieu’s clumsy control scored an own goal for Thailand.
After the shock of the first goal, striker Nguyen Thi Muon missed a clear chance when her close range header skimmed the post in the 13th minute.
Thailand set up a solid defence to block stormy attacks from Vietnam and they successfully kept leading the first half 1-0.
After the break, Thailand set up crowd defence and left only striker Kanjana in the front line, and their well-organised defence almost limited the pressure from Vietnam.
In the 71st minute, Minh Nguyet fired a close range shot in the penalty area, but her shot just hit the post and missed the goal.
In an attack in the 85th minute, Vietnamese left wing back Nguyen Thi Xuyen sent a curve to the target to force Thai goalie Waraporn Boonsing to parry the ball, and Nguyet came in to net the rebound into the back of the net.
Vietnam sent more attacks towards Thailand in extra-time, but they failed to beat Thailand’s defence.
In penalties, Thai players did better when they missed three, while Vietnam failed four shots.
In the third-place match, Myanmar beat Australia 1-0.