Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
hanh doi » thanh doi, hanh noi, hang doi
vu sach » vu bach, su sach, vu khach
ca tren » cau tren, cu tren, la tren
sach ky » sac ky, sach y, sach ty
cua te » cua tu
loc va » hoc va
luc va » duc va, tuc va
nang o » nang co, nang ho, nang ro
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: vu sach ky nang o hoi. hieu qua cham ((luc va) OR (loc va)) hanh doi ((ca tren) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang o hoi. hieu qua cham ((luc va) OR (loc va)) hanh doi ((ca tren) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang o hoi. hieu qua cham ((luc va) OR (loc va)) hanh doi ((ca tren) or (cua te))*.