Perhaps you should try some spelling variations:
kho tang » cao tang
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su triet » su viet, su tien, ve triet
ky tang » ky nang, ky dang, ky trong
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
duc van » duc va, duc tan, duc manh
su cac » tu cac, su cao, su can
ve bao » te bao, va bao
dai su » dai sua, dai so, dan su

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

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