From the football forum, I did search of "2013 Schedule", and first limited to 90 days, then tried 30 days. Results were 1,500, going back across many years.
Sorry about that. If the search has a problem running your selected criteria, it falls back to doing a full search. Before it would just return nothing, so I figured this behavior was a little better.
You can also try the custom google site search box on the front page or in the footer.