Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
sach ty » sach y, sach tu, sach thu
van cua » vang cua, ban cua, dan cua
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((((nang xa) or (nang x))) or (mang may)) hoi. hieu va lam duc ban thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((((nang xa) OR (nang x))) OR (mang may)) hoi. hieu va lam duc ban thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((((nang xa) or (nang x))) or (mang may)) hoi. hieu va lam duc ban thanh van cua tre*.