Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
tinh ung » tinh dung, trinh ung, tinh hung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: doi ((chieu sach) or (chieu sang)) - canh tinh ung dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - canh tinh ung dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - canh tinh ung dung cong tan toan cau*.