Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
canh tang » anh tang, canh tranh, cang thang
tang vat » tang van, dang vat, bang vat
vat dung » van dung, va dung, viet dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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

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