Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
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 thanh) or (trieu tinh)) - hanh ((trinh va) or (trinh ve)) hang cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (trieu tinh)) - hanh ((trinh va) OR (trinh ve)) hang cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (trieu tinh)) - hanh ((trinh va) or (trinh ve)) hang cong dan than cau*.