Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
pham thuc » phap thuc, pham chuc, nham thuc
thanh di » thanh doi, thanh de, thanh do
thuc ban » thuoc ban, thuc dan, thu ban
su sach » vu sach
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
xang xa » mang xa, ang xa, dang xay
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thu ((xang xa) OR (lang xa)) hoi. hieu va pham thuc ban thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) thu ((xang xa) or (lang xa)) hoi. hieu va pham thuc ban thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) thu ((xang xa) or (lang xa)) hoi. hieu va pham thuc ban thanh di cua tre*.