Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, mang may
ca thuc » can thuc, cay thuc, va thuc
hanh di » hanh vi, hanh de, hang di
qua ca » qua cac, qua cua, qua cai
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang ma) OR (nang cao)) hoi. hieu qua ca thuc dan hanh di cua viet~.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ma) or (nang cao)) hoi. hieu qua ca thuc dan hanh di cua viet*.