Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
tu cach » tu cac
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
di cua » dai cua, doi cua, de cua
ve cam » ve cham, va cam, ve cai
o hoi » co hoi, o hoc, o hai

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: ((tu cach) OR (te sach)) ky nang o hoi. hieu ((ve cam) OR (ve cac)) duc ban thanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang o hoi. hieu ((ve cam) or (ve cac)) duc ban thanh di cua tre*.