Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
canh thanh » canh tranh, danh thanh, anh thanh
thanh can » thanh san, thanh van, thanh tan
bang cong » dang cong, bang song, hang cong
can bang » cao bang, can ban, van ban
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
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: ho ((chieu sach) or (chiet tach)) - canh thanh can bang cong dan ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - canh thanh can bang cong dan ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - canh thanh can bang cong dan ((than cau) or (toan cau))*.