Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
lai cua » dai cua, hai cua, lai chau
hoc ban » hoc bang, hoc dan, hoc bai
ve cham » va cham, ve chat, ve chim
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) OR (o hoi)). hieu ((ve cham) OR (vu cham)) hoc ban hanh lai cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) or (o hoi)). hieu ((ve cham) or (vu cham)) hoc ban hanh lai cua tre*.