Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dang xay » dang van, van xay
thanh de » hanh de, thanh ve, thanh do
su sach » vu sach
luc ban » duc ban, cuc ban, luc bat
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
dang xa » lang xa, dang ha, dang va
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu 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)) ky ((dang xa) OR (dang xay)) hoi. hieu ve cac luc ban thanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky ((dang xa) OR (dang xay)) hoi. hieu ve cac luc ban thanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky ((dang xa) OR (dang xay)) hoi. hieu ve cac luc ban thanh de cua tre*.