Complex sentence: His search included attending and studying several different denominations of Christianity, then classical Buddhism, Taoism, and Confucianism, and living in Asia for a number of years to observe those belief systems in action.
Split into simpler sentences: His search included attending and studying several different denominations of Christianity, then classical Buddhism, Taoism, and Confucianism. Next he lived in Asia for a number of years to observe those belief systems in action.