Thailand’s Rodthong opened the score in the 17th minute. The net of the Lao side was also rocked in the 43rd, 57th,60th and 85th minutes.
After three matches, Thailand fetched 7 points to top GroupB while Laos was still empty-handed.
With this win, Thailand advanced to the semi-finals andwill face the Philippines who come second in Group A.
The remaining match of the semi-finals will see thecompetition of Vietnam that tops Group A and Myanmar.
Both matches will take place at Cam Pha stadium on May 18.
Earlier on May 14, Vietnam routed Cambodia with a 7-0 win,helping the team complete the qualifying round at the top of Group A./.