Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chau tinh » cuu tinh, ha tinh, cua tinh
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
tinh va » tich va, trinh van, trinh vat
va dung » van dung, va duong, vat dung

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