Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
van phong » hai phong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than cau » toan cau, phan cau, than cap

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 sang - canh trinh ((van phong) or (van dong)) ((cong ban) OR (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - canh trinh ((van phong) OR (van dong)) ((cong ban) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - canh trinh ((van phong) or (van dong)) ((cong ban) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh trinh ((van phong) or (van dong)) ((cong ban) OR (cong san)) than cau*.