Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
tran xuan » tran quang
hung cong » nhung cong, hung cuong, phung cong
tran van » luan van
cong dan » cong san, cong tan, huong dan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - thanh ((tran xuan) or (tran van)) hung cong dan ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh ((tran xuan) OR (tran van)) hung cong dan ((than cau) OR (phan cau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - thanh ((tran xuan) or (tran van)) hung cong dan ((than cau) OR (phan cau))*".