Perhaps you should try some spelling variations:
ban hanh » ban hang
cham xuc » cam xuc, chat xuc, cham soc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sang ma » tang ma, sang tao, sang tai
xuc ban » duc ban, cuc ban, quoc ban
nang ma » tang ma, nang cao
ve cham » va cham, ve chat, vu cham
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

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