Vietnam captain Khuat Van Khang converted the penalty and helped Vietnam get ahead.
Kroekphon equalized for Thailand in the penalty shootout.
Van Truong missed his shot but he was allowed to retake the penalty after Thailand keeper came out of his line. Truong succeeded the second time and Seksan also converted his penalty, putting the score to 2-2.
Both Vietnam and Thailand suffered disappointing losses in the semifinals on Wednesday.
Vietnam lost 0-3 to Malaysia while Thailand were 0-2 down to Laos, to everyone's surprise. This game is a chance for both teams to redeem a mediocre tournament.