Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh de » hanh ve, hanh kem
danh di » danh du, xanh di, danh dien
sach ty » sach y, sach thu, xach tay
qua nam » quan nam, cua nam, quang nam
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach uu
cuu tre » cua tre, cau tren, cau treo

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) OR (sach tu)) lang xa hoi. hieu qua nam thuc vat ((danh di) or (hanh de)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach tu)) lang xa hoi. hieu qua nam thuc vat ((danh di) OR (hanh de)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) OR (sach tu)) lang xa hoi. hieu qua nam thuc vat ((danh di) or (hanh de)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) OR (sach tu)) lang xa hoi. hieu qua nam thuc vat ((danh di) or (hanh de)) cuu tre*.