Perhaps you should try some spelling variations:
ban thanh » ban hanh
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, pham duc, nam duoc
nang xa » nang x, lang xa, nang ma

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 ky nang xa hoi. hieu van ((cam duc) OR (cao duc)) ((ban thanh) or (ban hang)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van ((cam duc) OR (cao duc)) ((ban thanh) OR (ban hang)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van ((cam duc) OR (cao duc)) ((ban thanh) or (ban hang)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van ((cam duc) OR (cao duc)) ((ban thanh) or (ban hang)) vai cua triet*.