Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
thanh ca » thanh cha, thanh cac, thanh ha
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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 x) or (lang xa)) hoi. thien van nam thuc ban thanh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang x) OR (lang xa)) hoi. thien van nam thuc ban thanh ca cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang x) or (lang xa)) hoi. thien van nam thuc ban thanh ca cua tre*.