Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
thuc van » thuc vat, thuc dan, thuc va
ve cham » va cham, ve chat, vu cham
bai cua » ban cua, bai ca, hai cua
xay hoi » xa hoi, tay hoi, cay phoi
sach o » sach lo, sac o, sach y
ve cam » ve cac, va cam, ve cai
o dang » xo dang, do dang, so dang

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