Mai Xuân Hợp was a member of Vietnam U23 and played at a football tournament where?
Mai Xuân Hợp:  He was a member of Vietnam U23 played at 2009 Southeast Asian Games. Football at the 2009 Southeast Asian Games: The football (soccer) tournament at the 2009 Southeast Asian Games in Vientiane of Laos.
Vientiane of Laos