Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
sach ly » sach lo, sach ty, sach hay
xuc ban » duc ban, cuc ban, quoc ban
va chat » van chat, va phat, hoa chat
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 ((sach ly) OR (sach y)) nang x hoi. hieu ((va chat) OR (cao chat)) xuc ban thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach y)) nang x hoi. hieu ((va chat) or (cao chat)) xuc ban thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach y)) nang x hoi. hieu ((va chat) or (cao chat)) xuc ban thanh vi cua tre*.