Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
su cach » su sach, su cac, cuu cach
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
tu cach » tu cac
di su » doi su, ki su, da su

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: ((su cach) OR (tu cach)) tu nang xa hoi. ((hieu qua) OR (hieu quan)) cam xuc van hanh di su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cach) OR (tu cach)) tu nang xa hoi. ((hieu qua) or (hieu quan)) cam xuc van hanh di su triet~".
• Adding a wildcard symbol may retrieve word variants: ((su cach) OR (tu cach)) tu nang xa hoi. ((hieu qua) or (hieu quan)) cam xuc van hanh di su triet*.