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