Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dung cong, dang cong
tranh ban » trinh ban, tranh hang, tranh luan
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
tran van » luan van

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 tung cua dong cong tan ((tranh ban) or (tran van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh tung cua dong cong tan ((tranh ban) OR (tran van)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung cua dong cong tan ((tranh ban) or (tran van))*.