How many movies have Nguyễn Tăng Hồng and Đoàn Châu Mậu collaborated on?

They have worked on 1 movie together! Their first movie together was From Saigon to Dien Bien Phu (1967) and was their highest rated movie together. They have not worked together since From Saigon to Dien Bien Phu (1967).