Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
cam thu » nam thu, cac thu, ca thu
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cam tu » nam tu, dam tu, tam tu
x hoi » xa hoi, o hoi, x ho

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

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