Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
sach ty » sach tu, sach thu, xach tay
xang xa » lang xa, mang xa, ang xa
vai cua » dai cua, hai cua, lai cua
va nam » van nam, ha nam, va nay
vi 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: tu ((sach ty) or (sach y)) xang xa hoi. lieu va nam thuc dan thanh ((vi cua) OR (vai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) xang xa hoi. lieu va nam thuc dan thanh ((vi cua) OR (vai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) xang xa hoi. lieu va nam thuc dan thanh ((vi cua) OR (vai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) xang xa hoi. lieu va nam thuc dan thanh ((vi cua) OR (vai cua)) tu*.