Kanjana Sung-Ngoen (hands raised) celebrates with her team after scoring against Vietnam during their AFC Women's Asian Cup soccer match at Thong Nhat Stadium in Ho Chi Minh City on Wednesday.
On 65 minutes a dangerous cross-shot from Kanjana was judged to have been parried over the line by the home side's goalkeeper sparking delirium among the Thai players and bench.
But Vietnam threatened a late fightback with a long-range shot on 85 minutes by Tuyet Dong.
It sparked a late and ultimately fruitless surge on the Thai goal as Vietnam finished the tournament in sixth place.
In the group stage, Thailand lost 7-0 to China, were defeated 4-0 by South Korea and beat Myanmar 2-1.