Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
xo dang » cao dang
va cam » va cham, va cac, va cao
o dang » do dang, so dang, o dong
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: thuoc sach ((o dang) or (xo 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: thuoc sach ((o dang) OR (xo dang)) xay hoi. hieu va cam tuc van thanh ((vi cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((o dang) or (xo dang)) xay hoi. hieu va cam tuc van thanh ((vi cua) or (dai cua)) tre*.