Defending champions Vietnam struck twice in the second half to subdue host nation Philippines 2-0 while Thailand edged Myanmar 1-0 in their semi-final.

It will be a second meeting between the two teams in the 2019 Sea Games, having settled for a 1-1 draw in their Group B encounter on November 26.

Myanmar defeated Malaysia 5-0 in Group A while Thailand beat Indonesia 5-1 in Group B, with both teams finishing runners-up in their respective groups.

Thailand, the 2017 silver medallists, will face Group A winners Philippines in the semi-finals on Thursday with defending champions Vietnam to play Myanmar.

Vietnam - who played to a 1-1 draw with Thailand in their opening match - defeated Indonesia 6-0 in Group B while Philippines cruised 5-0 past Malaysia in Group A.

Indonesia's hopes now hinge on defeating Thailand on Monday while Malaysia will have to defeat Myanmar.

Hosts Philippines, meanwhile, produced a gritty performance to grab a point in a goalless draw with Myanmar in Group A.

Vietnam won gold two years ago by the finest of margins, edging Thailand on goal difference after both finished on 10 points and the scenario could well be repeated in this edition.

Indonesia defeated Laos to take second spot in the group on 12 points, one behind Vietnam but, crucially, two more than Thailand.

Vietnam will play Cambodia in the semi-finals while Indonesia will meet Group A winners Myanmar on Saturday.

Cambodia, having never won a medal in men's football at the SEA Games, claimed their spot in the knockout stage as Group A runners-up with seven points to their name, while it was a heartbreak ending for Philippines, who were edged out on goal difference despite their 3-1 win.

Either Indonesia or Thailand will accompany Vietnam into the semi-finals, with their fate to be decided in Thursday's final round of matches.

Both are on nine points, with Indonesia defeating Brunei Darussalam 8-0 on Tuesday and Thailand beating Singapore Laos 2-0.

Thailand will play Vietnam in their final tie while Indonesia will meet Laos.