Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan hang
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hai cua » thai cua, dai cua, hoi cua
ve cham » ve chat, vu cham, ve chim
va cham » va chat, va tham
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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: su sac ky tang ma hoi. hieu ((ve cham) OR (va cham)) dua ((ban thanh) OR (ban hang)) hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang ma hoi. hieu ((ve cham) or (va cham)) dua ((ban thanh) OR (ban hang)) hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang ma hoi. hieu ((ve cham) or (va cham)) dua ((ban thanh) OR (ban hang)) hai cua tre*.