Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
thanh va » thanh van, hanh va, thanh ha
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

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: ((doi chieu) OR (ho chieu)) sang - canh ((thanh va) OR (trinh va)) nhung cong tan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) sang - canh ((thanh va) or (trinh va)) nhung cong tan phan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) sang - canh ((thanh va) or (trinh va)) nhung cong tan phan cau*.