Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hai cua » thai cua, dai cua, hoi cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang xa hoi. hieu ((va cam) or (ve cac)) duc ((ban thanh) OR (ban hanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu ((va cam) OR (ve cac)) duc ((ban thanh) OR (ban hanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. hieu ((va cam) or (ve cac)) duc ((ban thanh) OR (ban hanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu ((va cam) or (ve cac)) duc ((ban thanh) OR (ban hanh)) hai cua tre*.