Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
doi cua » dai cua, hoi cua, dong cua
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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: vu sach ky nang x hoi. hieu qua cham ((xuc va) OR (tuc va)) hanh ((vi cua) OR (doi cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu qua cham ((xuc va) OR (tuc va)) hanh ((vi cua) or (doi cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu qua cham ((xuc va) OR (tuc va)) hanh ((vi cua) or (doi cua)) tre*.