Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thi chieu » thi chien, thi hieu, theo chieu
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (thi chieu)) xanh - hanh trang ((va hang) or (va lang)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (thi chieu)) xanh - hanh trang ((va hang) OR (va lang)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (thi chieu)) xanh - hanh trang ((va hang) or (va lang)) cong tac toan cau*.