Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
tai cua » thai cua, tai cuc, tri cua
ly hang » ly quang
hieu va » lieu va, hieu qua
cam duc » cam xuc, pham duc, nam duoc
ma hoi » mai hoi, xa hoi, ma hoa
ly van » le van, ly va, ly von
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 van) or (ly hang)) ma hoi. hieu va ((cam duc) or (cao duc)) van thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly van) OR (ly hang)) ma hoi. hieu va ((cam duc) OR (cao duc)) van thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly van) or (ly hang)) ma hoi. hieu va ((cam duc) or (cao duc)) van thanh tai cua te*.