Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
dang xay » dang van, van xay
van cach » va cach, van canh, vat cach
hieu van » hieu va, thien van, lieu va
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
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
di cuu » di cau, di cua, dinh cuu

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 ((((nang xa) or (dang xay))) or (nang ma)) hoi. hieu van cach thuc va danh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((((nang xa) OR (dang xay))) OR (nang ma)) hoi. hieu van cach thuc va danh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach y ((((nang xa) or (dang xay))) or (nang ma)) hoi. hieu van cach thuc va danh di cuu tre*.