Attacking midfielder Tran Phi Sonheaded in just 12 minutes after the opening whistle to open the scoringfor the four-time finalists but the scoring board did not change untilthe break.
In the early minutes of the secondhalf, Timor Leste tried to deploy their formation further forwards inorder to search for goals, but it only made them more vulnerable andVietnam quickly took chances to add more goals.
Just five minutes after the break, striker Mac Hong Quan doubled theadvantage with a powerful header and skipper Que Ngoc Hai made it 3-0with a stunning goal before winger Vo Huy Toan wrapped the match forVietnam with a close-range shot.
With four wins from as many games, Vietnam rose to the top of the group, ahead of Thailand on goal difference.
Thailand also made it through to the last four after four wins.
Vietnam and Thailand will meet in the last match of the group on June 10.
In Group A, no team has ensured their place in the semifinals withMyanmar, Singapore and Indonesia standing better chances to reach thelast four.-VNA