Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
trung van » truong van, trong van, trung va
van nhung » van nhuong, va nhung, van hung
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: hoc ((thien hach) or (tien thanh)) - thanh trung van nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (tien thanh)) - thanh trung van nhung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (tien thanh)) - thanh trung van nhung cong dan than cau*.