Perhaps you should try some spelling variations:
ban hanh » ban hang
dang xay » dang van, van xay
cham xuc » chat xuc, cham soc, pham duc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((dang xay) or (nang x)) hoi. hieu ve ((cham xuc) or (cam xuc)) ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang xay) OR (nang x)) hoi. hieu ve ((cham xuc) OR (cam xuc)) ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang xay) or (nang x)) hoi. hieu ve ((cham xuc) or (cam xuc)) ban hanh vi cua tre*.