Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
sach dao » lanh dao
vien cac » vien bach, vien dai, vien da
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
van hoi » van hoc, van hoe, van loi
sach v » sach va, sach y, sach 2
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach v) or (sach dao)) lang ((van hoi) or (van hoa)). hieu vien cac xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach dao)) lang ((van hoi) OR (van hoa)). hieu vien cac xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach dao)) lang ((van hoi) or (van hoa)). hieu vien cac xuc van hanh vi cua tre*.