How many movies have Dang Phi and Nguyen Trang collaborated on?

They have worked on 3 movies together! Their first movie together was The Anthem of the Heart (2015) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since Maquia: When the Promised Flower Blooms (2018). They are most known for their animation films together.