Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cua te » cua tu
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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: toc sach ky tang ma hoi. hieu ve cac du ((va thanh) OR (ban thanh)) dat ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky tang ma hoi. hieu ve cac du ((va thanh) OR (ban thanh)) dat ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang ma hoi. hieu ve cac du ((va thanh) OR (ban thanh)) dat ((cua tre) or (cua te))*.