Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
hang di » hang doi, hang dien, hang dich
hang vi » hang va, hanh vi, khang voi
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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 v nang xa hoi. hieu va cac tuc van ((hang di) OR (hang vi)) cua triet~.
• Adding a wildcard symbol may retrieve word variants: so sach v nang xa hoi. hieu va cac tuc van ((hang di) or (hang vi)) cua triet*.