Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tong cong » trong cong, cong cong, dung cong
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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 - canh ((tranh va) or (trinh va)) tong cong tan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh ((tranh va) OR (trinh va)) tong cong tan phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh ((tranh va) or (trinh va)) tong cong tan phan cac*.