Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
doi chieu » doc hieu, doi chi, ho chieu
thi chieu » thi chien, thi hieu, theo chieu
va duong » van duong, va tuong, va huong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, vat dung, va ung

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

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