The editor who wrote the title of my article left out the word "commencement". Because editors tend to change the exact wording, it can sometimes be more efficient to pick out several key words and do a search by post time. If you use the words "Santorum, protesters, speech" it picks it up.
I am guilty of the same thing, though. There was an earlier post that had the exact story with still a different title. If I had searched on only "Santorum", I would have picked it up:
Protesters Leave Sen. Santorum Address ^