Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cac thuc » cach thuc, cac thu, can thuc
so sach » so sanh, bo sach, co sach
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, mang may, mang cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((((mang xa) OR (dang xay))) or (nang ma)) hoi. lieu va cac thuc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((((mang xa) OR (dang xay))) OR (nang ma)) hoi. lieu va cac thuc va danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((((mang xa) OR (dang xay))) or (nang ma)) hoi. lieu va cac thuc va danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((((mang xa) OR (dang xay))) or (nang ma)) hoi. lieu va cac thuc va danh di cua tre*.