How many movies have Hoài Lâm and Trần Ngọc Giàu collaborated on?

They have worked on 1 movie together! Their first movie together was Quý Tử Bất Đắc Dĩ (2015) and was their highest rated movie together. They have not worked together since Quý Tử Bất Đắc Dĩ (2015).