Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
cua viet » hoa viet, cua vat, cua dieu
su sach » so sach, vu sach
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
y sang » _ sang, duy sang
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y sang dai hoi. hieu ve am thuc va hanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y sang dai hoi. hieu ve am thuc va hanh vi ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: su sach y sang dai hoi. hieu ve am thuc va hanh vi ((cua viet) or (ca viet))*.