Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ly quang » le quang, vu quang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
duc van » duc tan, duc manh, duc phan
tai cua » thai cua, tai cuc, tri cua
cua te » cua tu

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 cau ((duc van) or (duc va)) thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly quang) OR (ty xang)) xa hoi. hieu van cau ((duc van) OR (duc va)) thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly quang) or (ty xang)) xa hoi. hieu van cau ((duc van) or (duc va)) thanh tai cua te*.