Perhaps you should try some spelling variations:
thai hoc » dai hoc, bai hoc, hoi hoc
hoc manh » hoc anh, hoc hanh, hoc danh
phan cua » nhan cua, than cua, han cua
phat cua » nhat cua, chat cua, hai cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thai hoc manh - hanh ((phan cua) or (phat cua)) trong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thai hoc manh - hanh ((phan cua) OR (phat cua)) trong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: thai hoc manh - hanh ((phan cua) or (phat cua)) trong cong dan than cau*.