Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (tu san)) ky lang xa hoi. ((lieu va) or (hieu va)) cao duc va hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (tu san)) ky lang xa hoi. ((lieu va) OR (hieu va)) cao duc va hanh va su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (tu san)) ky lang xa hoi. ((lieu va) or (hieu va)) cao duc va hanh va su triet*.