Perhaps you should try some spelling variations:
quang dien » luong dien, quan den, quang yen
quan dien » quan den, quan doan, toan dien
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
cam tu » cam thu, nam tu, dam tu
tu van » tu va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky nang x hoi. ((hieu van) or (hieu qua)) cam tu van ((quang dien) OR (quan dien)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang x hoi. ((hieu van) OR (hieu qua)) cam tu van ((quang dien) OR (quan dien)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky nang x hoi. ((hieu van) or (hieu qua)) cam tu van ((quang dien) OR (quan dien)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang x hoi. ((hieu van) or (hieu qua)) cam tu van ((quang dien) OR (quan dien)) su triet*.