Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu ve » hieu va, hieu van
danh vi » dinh vi, danh di, danh va
san ky » sang ky, van ky, ban ky
dan ky » van ky
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam 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) OR (dan ky)) nang x hoi. hieu ve cam tu va ((danh vi) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (dan ky)) nang x hoi. hieu ve cam tu va ((danh vi) or (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (dan ky)) nang x hoi. hieu ve cam tu va ((danh vi) or (hanh vi)) cua triet*.