How many movies have Jan Vô Danh and Trần Kim Thạch collaborated on?

They have worked on 3 movies together! Their first movie together was Cards on the Table: The Gunshot on the Highland (1983) and was their highest rated movie together. They have not worked together since Cards on the Table: The Great Flood and the Tango no. 3 (1984). They are most known for their thriller films together.