Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
duong cong » dung cong, luong cong, duong trong
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
va duong » van duong, va tuong, va huong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (doi chieu)) tinh - ((hanh tang) or (hanh trinh)) va duong cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (doi chieu)) tinh - ((hanh tang) OR (hanh trinh)) va duong cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (doi chieu)) tinh - ((hanh tang) or (hanh trinh)) va duong cong tac tran cau*.