Perhaps you should try some spelling variations:
anh thuc » am thuc, dan thuc, anh tu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
va anh » van anh, va danh, va hanh

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 y ((nang xa) OR (nang x)) hoi. hieu va anh thuc van hanh vi ((cuu tre) OR (cua tre))~.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu va anh thuc van hanh vi ((cuu tre) or (cua tre))*.