Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thi chieu » thi chien, thi hieu, thi hien
anh tang » anh bang, anh dang, anh nang
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ((thi chieu) or (theo chieu)) xanh - anh tang ((cua hang) OR (cua dang)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chieu)) xanh - anh tang ((cua hang) OR (cua dang)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo chieu)) xanh - anh tang ((cua hang) OR (cua dang)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chieu)) xanh - anh tang ((cua hang) OR (cua dang)) cong tac toan cau*.