Indonesia needed extra time to overcome a fighting Myanmar 4-2 while Vietnam strolled to a 4-0 win over surprise semi-finalists Cambodia.

Whoever wins the gold medal in Tuesday's final will end a long wait - Indonesia were last champions in 1991 while Vietnam - then South Vietnam - won the inaugural edition in 1959.

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.

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.

Myanmar defeated Cambodia to move to 10 points from four matches while Malaysia beat Timor-Leste 4-0 for their first win of the tournament.

The second semi-finalists from the group will be decided on Wednesday, with Cambodia, Malaysia and Philippines all on four points. Second-placed Cambodia will play Malaysia while Philippines meet Timor-Leste.

Thailand saw off Singapore 3-0 to keep their hopes alive while Laos defeated Brunei Darussalam 3-0 to register their first win of the tournament.