Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
ly vang » ly van, ly quang
ly hang » ly quang
van cau » van dau, van hau, van chat
cau dac » cuu dac, cac dac, cau danh
dac ban » cac ban, dac san, duc ban
cua tre » cua te, cuu tre, cua triet
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 ((ly vang) or (ly hang)) x hoi. hieu van cau dac ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly vang) OR (ly hang)) x hoi. hieu van cau dac ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly vang) or (ly hang)) x hoi. hieu van cau dac ban thanh dai cua tre*.