Perhaps you should try some spelling variations:
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
soc ban » hoc ban, coc ban, so ban
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
tu san » thu san, tu ban, tu can
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu bac

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