Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh dong » anh dong, ha dong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
dong va » dung va, dong ha, luong va

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) or (chieu sach)) - hanh dong va nhung ((cong tan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - hanh dong va nhung ((cong tan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu sach)) - hanh dong va nhung ((cong tan) or (cong san)) toan cau*.