Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham lo » cham o, cam lo, cham soc
via cua » gia cua, gian cua, giau cua
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau
ca cua » co cua
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai
lo va » lo van, lao va, ly va

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: tu sach y nang ((x hoi) OR (o hoi)). hieu ve cham lo va dan ((ca cua) OR (via cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) OR (o hoi)). hieu ve cham lo va dan ((ca cua) or (via cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) OR (o hoi)). hieu ve cham lo va dan ((ca cua) or (via cua)) tre*.