Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va
y nang » ky nang, ly nang, v nang
loc va » hoc va
de cua » le cua, dieu cua
te cua » tue cua, le cua

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: te sach y nang xa hoi. hieu van cau ((luc va) OR (loc va)) dinh ((de cua) OR (te cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu van cau ((luc va) OR (loc va)) dinh ((de cua) or (te cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van cau ((luc va) OR (loc va)) dinh ((de cua) or (te cua)) triet*.