Perhaps you should try some spelling variations:
ban thinh » ban thanh, ban tinh, van thinh
dang xay » dang van, van xay
thinh le » trinh ly
thu sach » thuat sach, thuoc sach, thu hoach
hieu va » lieu va, hieu qua
tu sach » su sach, te sach, tu cach
lang xa » lang ha, lang van
va dam » van dam, va dao, va dau
dam te » dam me, dam de, dam tu
te ban » te bao
le cua » ly 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: ((tu sach) OR (thu sach)) thu ((lang xa) OR (dang xay)) hoi. hieu va dam te ban thinh le cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) thu ((lang xa) OR (dang xay)) hoi. hieu va dam te ban thinh le cua vat~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) thu ((lang xa) OR (dang xay)) hoi. hieu va dam te ban thinh le cua vat*.