At the beginning of his career, Vân Sơn worked as a cheerleader in weddings, meetings, and tea rooms' events on the weekends.

In 1990, he co-operated with Bảo Liêm - the two later became the most popular comedian duo in the overseas Vietnamese community in California in the 90s.

In 1996, when Bảo Liêm decided to stop working with him due to some conflicts, he found and started performing together with comedian Hoài Linh.

In 1999, after Hoài Linh returned to Vietnam, Bảo Liêm was invited to cooperate with Vân Sơn Entertainment again.

In recent years, Vân Sơn frequently went back to Vietnam and participated in various television game shows.