Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
dung doi » huong doi, dung tai, dung co
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cam tuc » cam xuc, cam tu, nam thuc
xa dung » xay dung, xa dong, va dung
cua tre » cua te, cuu tre, dua tren

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: so sach ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc xa dung doi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. ((hieu ve) or (hieu van)) cam tuc xa dung doi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. ((hieu ve) or (hieu van)) cam tuc xa dung doi ((cua tre) OR (cua triet))*.