Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
dang xay » dang van, van xay
te sach » toc sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
sach o » sach lo, sac o, sach y
o dang » xo dang, do dang, so dang
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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 o dang xay hoi. hieu va cam tuc van thanh ((vi cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o dang xay hoi. hieu va cam tuc van thanh ((vi cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach o dang xay hoi. hieu va cam tuc van thanh ((vi cua) or (dai cua)) tre*.