After the Han Chinese conquered what is now Vietnam, the Vietnamese people adopted Confucianism, Buddhism, and Daoism. In the Philippines, a sultanate controlled the area which led to the spread of Islam in the area.
So the complete sentences are:
After the Han Chinese conquered what is now Vietnam, the Vietnamese people adopted 1. Buddhism, Confucianism, and Daoism. In the Philippines, a sultanate controlled the area which led to the spread of 4. Islam.