Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) xanh - hanh tran van nhung ((cong tan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) xanh - hanh tran van nhung ((cong tan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) xanh - hanh tran van nhung ((cong tan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) xanh - hanh tran van nhung ((cong tan) OR (cong san)) toan cau*.