Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, tu cach
cuc ban » cua ban, cac ban, cuu ban
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
vi cua » vai cua, di cua
va cam » va cac, va cao, va cai

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) OR (te sach)) ky tang xa hoi. hieu ((va cam) OR (va cham)) cuc ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky tang xa hoi. hieu ((va cam) OR (va cham)) cuc ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang xa hoi. hieu ((va cam) OR (va cham)) cuc ban hanh vi cua tre*.