Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van nang » van quang, van ban, van dong
nang dai » nang dau, nang tai, lang dai
hanh vai » hanh vi, hanh va, hanh tai
cam thuc » am thuc, can thuc, cay thuc
sach van » sach han, sach va, bach van
nam thuc » nam thuoc, am thuc, nam thu
cam thu » nam thu, cac thu, ca thu
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
dai hoi » dai hoc, dai hai, dai moi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach van nang dai hoi. hieu ve ((((cam thuc) or (nam thuc))) or (cam thu)) va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach van nang dai hoi. hieu ve ((((cam thuc) OR (nam thuc))) OR (cam thu)) va hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach van nang dai hoi. hieu ve ((((cam thuc) or (nam thuc))) or (cam thu)) va hanh vai cua viet*.