Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
quang dung » quang trung, ung dung, cuong dung
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 quang dung cong tan ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - canh tinh quang dung cong tan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu sang)) - canh tinh quang dung cong tan ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - canh tinh quang dung cong tan ((toan cau) OR (toan tap))*.