Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
tuc ban » thuc ban, truc ban, tu ban
via cua » gia cua, gian cua, giau cua
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((xang xa) or (mang xa)) hoi. hieu qua cac tuc ban thanh ((via cua) or (ca cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((xang xa) OR (mang xa)) hoi. hieu qua cac tuc ban thanh ((via cua) OR (ca cua)) te.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((xang xa) or (mang xa)) hoi. hieu qua cac tuc ban thanh ((via cua) or (ca cua)) te*.