Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
lang van » dang van, tang van, hoang van
cam thuc » am thuc, nam thuc, cam thu
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
va cam » va cham, va cac, va cao
vi cua » di cua

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: te sach ty ((xang xa) OR (lang van)) hoi. hieu va cam thuc van hanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((xang xa) or (lang van)) hoi. hieu va cam thuc van hanh ((vi cua) OR (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((xang xa) or (lang van)) hoi. hieu va cam thuc van hanh ((vi cua) OR (vai cua)) tre*.