Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va dung » van dung, va duong, vat dung
dung co » dung cho, dung cong, dung cua
cua tre » cua te, cuu tre, cua triet
ve nam » he nam, va nam, le nam
sac ky » cac ky
x hoi » xa hoi, o hoi, x ho

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 ((sac ky) OR (sai ky)) nang x hoi. hieu ve nam thuc va dung co ((cua tre) OR (cau tren))~.
• Adding a wildcard symbol may retrieve word variants: so ((sac ky) or (sai ky)) nang x hoi. hieu ve nam thuc va dung co ((cua tre) or (cau tren))*.