Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
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 nang) OR (ly vang)) xa hoi. hieu ve ((pham duc) or (cao duc)) ban thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ly vang)) xa hoi. hieu ve ((pham duc) OR (cao duc)) ban thanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) OR (ly vang)) xa hoi. hieu ve ((pham duc) or (cao duc)) ban thanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) OR (ly vang)) xa hoi. hieu ve ((pham duc) or (cao duc)) ban thanh tai cua te*.