Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
anh tang » anh bang, anh dang, anh nang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap
tang va » trang va, tang van, thang va

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

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