Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

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