Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
van hai » van ha, van chat, van hanh
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
te cac » tu cac, ve cac, te cao
son va » song va, son la, lon va

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 nang xa hoi. hieu ((van hai) or (va tham)) son va hanh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky nang xa hoi. hieu ((van hai) OR (va tham)) son va hanh vi ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky nang xa hoi. hieu ((van hai) or (va tham)) son va hanh vi ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: te cac ky nang xa hoi. hieu ((van hai) or (va tham)) son va hanh vi ((cua triet) OR (va triet))*.