Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
sach ky » sac ky, sach y, sach ty
lai cua » dai cua, hai cua, lai chau
duoc va » nuoc va, duc va, duoc ma
quoc va » nuoc va, quoc gia, quoc oai
te sach » toc sach
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
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: te sach ky nang ((x hoi) OR (o hoi)). hieu ve chat ((quoc va) OR (duoc va)) hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) or (o hoi)). hieu ve chat ((quoc va) OR (duoc va)) hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (o hoi)). hieu ve chat ((quoc va) OR (duoc va)) hanh lai cua tre*.