Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
ly quang » le quang, vu quang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
nam duc » nam duoc, pham duc, nam thuc
duc van » duc va, duc tan, duc manh
cuu tre » cau tren, cau treo

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 nam duc van thanh vai ((cua tre) OR (cuu 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 nam duc van thanh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly quang) or (ty xang)) xa hoi. hieu van nam duc van thanh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly quang) or (ty xang)) xa hoi. hieu van nam duc van thanh vai ((cua tre) OR (cuu tre))*.