Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang x ho. hieu vu cham ((xuc va) or (luc va)) hanh ((vi cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x ho. hieu vu cham ((xuc va) OR (luc va)) hanh ((vi cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x ho. hieu vu cham ((xuc va) or (luc va)) hanh ((vi cua) or (hai cua)) tre*.