Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
duoc ban » duc ban, quoc ban, buoc ban
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cua » vang cua, ban cua, dan cua
van lam » van nam
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
lang xa » dang xay, lang van
bo sach » co sach, hoc sach

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) or (bo sach)) ky ((lang xa) or (lang ha)) hoi. hieu van lam duoc ban thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ky ((lang xa) OR (lang ha)) hoi. hieu van lam duoc ban thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) ky ((lang xa) or (lang ha)) hoi. hieu van lam duoc ban thanh van cua tre*.