Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nhanh vi » nhanh va, nhanh thi, hanh va
ve triet » va trien, su triet
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
van hau » van ha, van hai, van dau
hau xuc » chat xuc
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

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: thu sach vu nang o hoi. hieu van hau xuc va ((nhanh vi) OR (hanh vi)) ve triet~.
• Adding a wildcard symbol may retrieve word variants: thu sach vu nang o hoi. hieu van hau xuc va ((nhanh vi) or (hanh vi)) ve triet*.