Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » thuc hanh, hoc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
xang xa » mang xa, ang xa, dang xay
va nam » van nam, ha nam, va nay
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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) OR (lang xa)) hoi. lieu va nam thuc dan thanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ((xang xa) OR (lang xa)) hoi. lieu va nam thuc dan thanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) ((xang xa) OR (lang xa)) hoi. lieu va nam thuc dan thanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) ((xang xa) OR (lang xa)) hoi. lieu va nam thuc dan thanh vi cua tu*.