Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
duc ban » duc tan, duc van, dua ban
ky tang » ky nang, ky dang, kho tang
va cao » va cac, va co, va dao
su cac » tu cac, su cao, su can
ve cam » ve cham, va cam, ve cai
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 cac ky tang xa hoi. hieu ((((ve cam) or (ve cac))) or (va cao)) duc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang xa hoi. hieu ((((ve cam) OR (ve cac))) OR (va cao)) duc ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su cac ky tang xa hoi. hieu ((((ve cam) or (ve cac))) or (va cao)) duc ban thanh dai cua tre*.