Perhaps you should try some spelling variations:
yen lang » den lang, ten lang, yen giang
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
te sach » toc sach
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
_ lang » o lang, _ land
va cam » va cham, va cac, va cao
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
cua te » cua tu

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 ((yen lang) OR (_ lang)) xa hoi. hieu va cam thuc van anh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: te sach ((yen lang) or (_ lang)) xa hoi. hieu va cam thuc van anh vi cua te*.