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
cam tuc » cam xuc, cam tu, nam thuc
vai cua » hai cua, lai cua, bai cua
tuc van » thuc van, truc van, tuc va
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ve cam » ve cham, ve cac, va cam
o dang » xo dang, do dang, so dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) o dang xay hoi. hieu ve cam tuc van thanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) o dang xay hoi. hieu ve cam tuc van thanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) o dang xay hoi. hieu ve cam tuc van thanh ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) o dang xay hoi. hieu ve cam tuc van thanh ((vai cua) or (dai cua)) tre*.