Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
khoa hoc » hoa hoc
cac xuc » cam xuc, cac nuoc, chat xuc
tu xang » ty xang, tu lang, tu quang
cho hoc » co hoc
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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) OR (toc sach)) tu xang ((cho hoc) OR (khoa hoc)). hieu ve cac xuc van hanh vi cua cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu xang ((cho hoc) or (khoa hoc)). hieu ve cac xuc van hanh vi cua cac~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tu xang ((cho hoc) or (khoa hoc)). hieu ve cac xuc van hanh vi cua cac*.