Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
dang van » hoang van, hang va
thuc van » thuc vat, thuc dan, thuc va
dang xay » van xay
hieu ve » hieu va, hieu van
hai cua » thai cua, hoi cua, lai cua
sach o » sach lo, sac o, sach y
ve am » va am

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 o ((dang xay) OR (dang van)) hoi. hieu ve am thuc van thanh ((hai cua) OR (dai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach o ((dang xay) OR (dang van)) hoi. hieu ve am thuc van thanh ((hai cua) or (dai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach o ((dang xay) OR (dang van)) hoi. hieu ve am thuc van thanh ((hai cua) or (dai cua)) tre*.