Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
vu nang » vuc nang, va nang, vu dang
van cac » van hac, van cau, van bac
cac cac » cac cach, ca cac, cac bac
cac van » cac dan
cua tre » cua te, cuu tre, cua triet
v nang » va nang, van nang, voi nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((v nang) OR (vu nang)) x hoi. hieu van cac cac van thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (vu nang)) x hoi. hieu van cac cac van thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) OR (vu nang)) x hoi. hieu van cac cac van thanh dai cua tre*.