Perhaps you should try some spelling variations:
ban hanh » ban hang
cham xuc » chat xuc, cham soc, pham duc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
vi cua » vai cua, di cua

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