Perhaps you should try some spelling variations:
ban hanh » ban hang
toc sach » hoc sach, doc sach, thuoc sach
cham cuc » cham cuu, pham cuc, pham chuc
cuc ban » cua ban, cac ban, cuu ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
vi cua » vai cua, di cua
ma hoi » mai hoi, xa hoi, ma hoa

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