Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, han ap, khan dam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((thanh tung) OR (thanh cong)) cua thong cong tan ((than cap) OR (khan ap))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((thanh tung) or (thanh cong)) cua thong cong tan ((than cap) or (khan ap))*.