Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
cong quang » luong quang, thong quang, duong quang
quang dung » quang trung, ung dung, cuong dung
ho chieu » hoc thieu, doi chieu, mot chieu
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: ((ho chieu) or (theo chieu)) xanh - thanh cong quang dung ((cong tan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - thanh cong quang dung ((cong tan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) xanh - thanh cong quang dung ((cong tan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) xanh - thanh cong quang dung ((cong tan) OR (cong san)) toan cau*.