Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
hanh di » hanh vi, hanh de, hang di
te cac » tu cac, ve cac, te cao
loc va » luc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ((ky lang) or (ky tang)) xa hoi. hieu va tham ((loc va) OR (hoc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky lang) OR (ky tang)) xa hoi. hieu va tham ((loc va) OR (hoc va)) hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ((ky lang) or (ky tang)) xa hoi. hieu va tham ((loc va) OR (hoc va)) hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: te cac ((ky lang) or (ky tang)) xa hoi. hieu va tham ((loc va) OR (hoc va)) hanh di cua triet*.