Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
tran tuan » tran xuan, tran thanh, tranh luan
tong cong » trong cong, cong cong, dung cong
cong tac » cong ty
tac ban » tai ban, tao ban, cac ban
ban cau » bang cau, ban can, van cau

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 - hanh ((tran tuan) or (tran quang)) tong cong tac ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((tran tuan) OR (tran quang)) tong cong tac ban cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((tran tuan) or (tran quang)) tong cong tac ban cau*.