In GRACE (our catalog) and in the article databases you can do a keyword search for your topic, but looking at the subjects is a great way to be more specific. Here are some sample subject searches from GRACE to get you started.
Buddhism - [Country Name]
Buddhism - Doctrines
Buddhism - History
Buddhism - Relations - Christianity
Buddhism - Sacred Books
Buddhist Ethics
Buddhist Literature
Buddhist Monasticism and Religious Orders
Buddhist Philosophy
Buddhist Sects
Dharma (Buddhism)
Gautama Buddha
Hinayana Buddhism
Mahayana Buddhism
Pali Literature
Pure Land Buddhism
Shin (Sect)
Shin (Sect) - Doctrines
Tantric Buddhism
Theravada Buddhism
Tibetan Buddhism
Vajrayana
Zen Buddhism