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
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
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, vu nang, van 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: ((tu sach) OR (su sach)) v 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: "((tu sach) OR (su sach)) v nang x hoi. hieu van cac cac van thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) v nang x hoi. hieu van cac cac van thanh dai cua tre*.