Don't know if understood the question, but you can grab an RSS pheed for a given keyword phrase from Google News:

e.g. news.google.com/news?um=1&ned=us&hl=en&q=internet+marketing&output=rss

Just replace internet+marketing with your keyword phrase, with words separated by the + sign.

You can then do whatever manipulation you want and use this as a pheed in the usual way.