Since all your matches have to match the LIKE pattern in order to be included, the simple thing to do is assume that shorter values for the column you're matching are "better" matches, as they're closer to the exact value of the pattern.
ORDER BY LEN(item_nale) ASC
Alternatively, you could assume that values in which the match pattern appear earlier are "better" matches.
ORDER BY PATINDEX('%' + @user_input + '%', item_nale) ASC
Or you could combine the two; look for earliest matches first, and within those, prefer shorter values.
ORDER BY PATINDEX('%' + @user_input + '%', item_nale) ASC, LEN(item_nale) ASC
It's not as sophisticated as what full-text indexing does, and it only accounts for matching on a single column, but it gives decent enough results.