Perhaps you should try some spelling variations:
hieu sach » chieu sach, hieu cach, dien sach
trinh vat » trinh van, trinh luat, sinh vat
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
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: doc hieu sach - canh ((tranh va) or (trinh vat)) ((tong cong) or (cong cong)) tan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - canh ((tranh va) OR (trinh vat)) ((tong cong) OR (cong cong)) tan phan cac.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - canh ((tranh va) or (trinh vat)) ((tong cong) or (cong cong)) tan phan cac*.