Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
su sach » so sach
thu ban » thu hang
va phap » va phat, ban phap
va pham » van pham, va phat, va phan
nang ma » tang ma, sang ma, nang cao
tu nang » tru nang, tu nong, tu nano
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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 (vu sach)) tu nang ma hoi. hieu ((va pham) OR (va phap)) thu ban thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) tu nang ma hoi. hieu ((va pham) or (va phap)) thu ban thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) tu nang ma hoi. hieu ((va pham) or (va phap)) thu ban thanh di cua tre*.