Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thien van » thi van
tu sach » thu sach, su sach, te sach
cuc ban » cua ban, cac ban, cuu ban
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
van cam » van nam, van lam, van cau
ly hang » ly quang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ly hang) or (ty xang)) xa hoi. thien van cam ((cuc ban) or (duc ban)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly hang) OR (ty xang)) xa hoi. thien van cam ((cuc ban) OR (duc ban)) thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly hang) or (ty xang)) xa hoi. thien van cam ((cuc ban) or (duc ban)) thanh vai cua tre*.