Perhaps you should try some spelling variations:
nang hanh » nang thanh, dang hanh, nang hang
nang han » nang phan, nang hang, nang ban
nam thuc » nam thuoc, am thuc, nam thu
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
vi cua » di cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ve nam » he nam, va nam, le nam

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: tu san ky ((nang han) OR (nang hanh)) hoi. hieu ve nam thuc va danh ((vi cua) OR (vai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang han) OR (nang hanh)) hoi. hieu ve nam thuc va danh ((vi cua) or (vai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang han) OR (nang hanh)) hoi. hieu ve nam thuc va danh ((vi cua) or (vai cua)) triet*.