Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
cach tu » cach thuc
hieu va » lieu va, hieu qua
co thuc » do thuc, co thua, mo thuc
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho
va co » vo co

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: te ((sach ty) OR (cach tu)) nang x hoi. hieu va co thuc van hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (cach tu)) nang x hoi. hieu va co thuc van hanh di cua tre*.