Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va cham » va chat, va tham
goc va » hoc va, doc va, uoc va
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
tu cuu » tu huu, tu chu, tu cau
tu cua » hu cua, vu 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 cham ((goc va) OR (loc va)) hanh ((tu cuu) OR (tu cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. lieu va cham ((goc va) or (loc va)) hanh ((tu cuu) OR (tu cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. lieu va cham ((goc va) or (loc va)) hanh ((tu cuu) OR (tu cua)) tre*.