Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
ky tang » kho tang, ky trong, tay tang
ky dang » ky danh
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((((ky tang) or (ky nang))) or (ky dang)) xa hoi. lieu va cam duc van thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((ky tang) OR (ky nang))) OR (ky dang)) xa hoi. lieu va cam duc van thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((((ky tang) or (ky nang))) or (ky dang)) xa hoi. lieu va cam duc van thanh vai cua tre*.