Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
ly quang » le quang, vu quang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
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 quang) or (ty xang)) xa hoi. hieu van cam duc van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly quang) OR (ty xang)) xa hoi. hieu van cam duc van thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly quang) or (ty xang)) xa hoi. hieu van cam duc van thanh dai cua tre*.