Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
dung cong » dung trong
thanh va » thanh van, hanh va, thanh ha
cong tac » cong ty
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap
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: ho ((chieu sach) or (chiet tach)) - cong thanh va dung cong tac ((tran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - cong thanh va dung cong tac ((tran cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - cong thanh va dung cong tac ((tran cau) or (toan cau))*.