Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
doc sach » hoc sach, toc sach, nuoc sach
vien cac » vien bach, vien dai, vien da
tu tieng » luc tieng, tu tuong, tu trong
dan van » dang van, doan van, dao van
v nang » va nang, vu nang, van nang
anh vi » hanh vi, anh va, anh vu
anh ve » hanh ve, anh va, anh viet
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: doc sach ((v nang) OR (cam nang)) x hoi. hieu vien cac dan van ((anh vi) OR (anh ve)) tu tieng~.
• Adding a wildcard symbol may retrieve word variants: doc sach ((v nang) or (cam nang)) x hoi. hieu vien cac dan van ((anh vi) or (anh ve)) tu tieng*.