Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hung pham » nhung pham, nhung phat, dung phan
nang cong » nang song, dang cong, bang cong
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
dung cam » dung lam, dung cac, dung nam
cong ban » cong bang, cong san, cong tan

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 - thanh ((hung pham) or (dung cam)) nang cong ban thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((hung pham) OR (dung cam)) nang cong ban thanh lap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((hung pham) or (dung cam)) nang cong ban thanh lap*.