Perhaps you should try some spelling variations:
ban hanh » ban hang
cham xuc » chat xuc, cham soc, pham duc
sang tao » hang tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, mang may
cua tre » cua te, cuu tre, cua triet
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) OR (sang tao)) 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) OR (sang tao)) 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) OR (sang tao)) hoi. hieu ve ((cham xuc) or (cam xuc)) ban hanh vi cua tre*.