Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua nuoc » cua quoc, cua nguoi, cua thuoc
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
te sach » toc sach
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi

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 ((ty xang) OR (ky nang)) co hoi. hieu van cua nuoc va ((hanh lai) OR (hanh lam)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty xang) or (ky nang)) co hoi. hieu van cua nuoc va ((hanh lai) OR (hanh lam)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty xang) or (ky nang)) co hoi. hieu van cua nuoc va ((hanh lai) OR (hanh lam)) cua tre*.