Perhaps you should try some spelling variations:
qua chat » qua nhat, qua cham, luan chat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang o » nang co, nang ho, nang ro
xuc va » tuc va, luc va, xac va
vi cua » vai cua
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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: su sach ky nang o hoi. hieu qua chat ((xuc va) OR (duc va)) hanh ((vi cua) OR (di cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang o hoi. hieu qua chat ((xuc va) OR (duc va)) hanh ((vi cua) or (di cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hoi. hieu qua chat ((xuc va) OR (duc va)) hanh ((vi cua) or (di cua)) tre*.