Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van
than cau » toan cau, phan cau, than cap
phan cac » nhan cach, phan dau, phan lap
cong va » dong va, cong ha, cong tac

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 - thanh cong va nhung ((cong van) or (song van)) ((than cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh cong va nhung ((cong van) OR (song van)) ((than cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong va nhung ((cong van) or (song van)) ((than cau) or (phan cac))*.