Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
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 ty ((sang ma) or (mang may)) hoi. hieu ve am thuc va hanh vi ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((sang ma) OR (mang may)) hoi. hieu ve am thuc va hanh vi ((cua viet) OR (cua vat))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((sang ma) or (mang may)) hoi. hieu ve am thuc va hanh vi ((cua viet) OR (cua vat))*".