Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, tu cach
hanh di » hanh vi, hanh de, hang di
cuc ban » cua ban, cac ban, cuu ban
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
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
ve cam » ve cham, va cam, ve 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 ((ve cam) OR (ve cac)) cuc ban hanh di 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 ((ve cam) OR (ve cac)) cuc ban hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang xa hoi. hieu ((ve cam) OR (ve cac)) cuc ban hanh di cua tre*.