Tan Sinh opened the score for the visiting side from a penalty at the 22nd minute.
The Vietnamese continued to dominate a game that both sides wanted to win to ensure first place at the ranking table.
Vietnam nearly grabbed their second victory until goalkeeper Do Sy Huy made a mistake in the box area, causing a penalty kick for the host. Shwe Ko succeeded in levelling the result at the 82nd mark.
With one win and one draw Vietnam are at the top of the four-side tournament.
In an earlier match, Thailand beat Japanese Consadole Sapporo Club’s U18 squad 3-1 at the Mandalar Thiri Stadium.
In the next round, Vietnam will face Consadole Sapporo and Thailand will play Myanmar on August 26.
The two top teams will advance to the final while the two at the bottom will play in the third-placed play-off on August 28.
What the stars mean:
★ Poor ★ ★ Promising ★★★ Good ★★★★ Very good ★★★★★ Exceptional