Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
su xac » pu xac, su cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ((ky tang) or (ky dang)) xa hoi. hieu ve cham duc ((van thanh) or (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc ((van thanh) OR (ban hanh)) dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su xac ((ky tang) or (ky dang)) xa hoi. hieu ve cham duc ((van thanh) or (ban hanh)) dai cua triet*.