estelle weyl's dashboard

Is there a way to get the search results for trending topics to automatically NOT show tweets that include the subject of other trending topics? This would help to cut down spam.

For example, when I clicked on "Walter Cronkite" trending topic, about 80% of the tweets in the search results read something like this:

"You can Make $100.00 a Day on Twitter See how here! http://tinyurl.com/abcdefg Michael Jackson harry potter Walter Cronkite"

Were it not for spammers repeating the trending topic words, it is unlikely that Michael Jackson or Walter Cronkite would still be a trending topic.

Could the search read something like:
http://search.twitter.com/search?q=%2...
(which returned no spam results)

instead of simply

http://twitter.com/#search?q=%22Walter%20Cronkite%22
(which was mostly spam)