Perhaps you should try some spelling variations:
dung cong » dung trong
chi sach » chinh sach, chieu sach, co sach
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
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - canh ((tranh va) or (trinh va)) dung cong tan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - canh ((tranh va) OR (trinh va)) dung cong tan phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - canh ((tranh va) or (trinh va)) dung cong tan phan cac*.