Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
tang va » trang va, tang van, thang va
ran cau » van cau, ban cau, can cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chinh sach)) - hanh tang va nhung cong tan ((ran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh tang va nhung cong tan ((ran cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chinh sach)) - hanh tang va nhung cong tan ((ran cau) or (toan cau))*.