Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh le » thinh le, thanh ve, thanh de
sach thu » sach thue, sach tham, cach thuc
cao suc » cao su, cao duc
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao toc
le cua » ly cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) OR (sach thieu)) lang xa hoi. hieu va ((cao tuc) or (cao suc)) ban thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thieu)) lang xa hoi. hieu va ((cao tuc) OR (cao suc)) ban thanh le cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) OR (sach thieu)) lang xa hoi. hieu va ((cao tuc) or (cao suc)) ban thanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) OR (sach thieu)) lang xa hoi. hieu va ((cao tuc) or (cao suc)) ban thanh le cua vat*.