Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va tham » van tham, va cham, va thanh
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
goc va » hoc va, doc va, uoc va
loc va » hoc va, luc va
do cua » co cua, de cua, dong cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. lieu va tham ((goc va) OR (loc va)) hanh ((do cua) OR (doi cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. lieu va tham ((goc va) or (loc va)) hanh ((do cua) or (doi cua)) tre*.