Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((lai chau) or (doi chieu)) tinh - hanh trinh ((cua thong) or (cua dong)) cong tac tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((lai chau) OR (doi chieu)) tinh - hanh trinh ((cua thong) OR (cua dong)) cong tac tran cao.
• Adding a wildcard symbol may retrieve word variants: ((lai chau) or (doi chieu)) tinh - hanh trinh ((cua thong) or (cua dong)) cong tac tran cao*.