Perhaps you should try some spelling variations:
quang dien » quan dien, luong dien, quan den
van quang » van quan, tran quang, van tuan
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
dien su » dien tu, nien su, den su
tu cai » tu can, tu bai, tu cay
cam tu » cam thu, nam tu, dam tu
tu van » tu va

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