In every Phula home, a central room is dedicated to the worship of ancestors. The room contains an altar and a spirit door where the Phula people pray and give regular offerings to the spirits of the dead.

The Mang people group has a population in Vietnam of 3,700 and is one of 23 groups considered to be unengaged and unreached. This means that not only are the Mang less than 2 percent Evangelical Christian, but there are no current efforts to reach the Mang with the gospel. Many Mang will live their whole lives and never have the chance to hear about Jesus unless something changes.