Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
sach 2 » sach y
xuc va » duc va, tuc va, luc va

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: tu ((sach v) OR (sach 2)) nang xa hoi. hieu vien cac xuc va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) or (sach 2)) nang xa hoi. hieu vien cac xuc va hanh vi ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach 2)) nang xa hoi. hieu vien cac xuc va hanh vi ((cua tre) OR (cuu tre))*.