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

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 day) or (thuc dan)) 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 day) OR (thuc dan)) hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach van nang dai hoi. hieu ve cam ((thuc day) or (thuc dan)) hanh vai cua viet*.