I added "9-11" tag to some diaries tagged with "9/11" because "9-11" works.
As someone pointed out the slash in "9/11" seems to confuse the computer system.
I left the "9/11" tag so that if that gets fixed it will work.
I used the google search techniques posted by Del C
google-> site:www.dailykos.com/storyonly query term
details here:
http://www.dailykos.com/comments/2005/10/14/19523/992/55#55
Hope that helps.
Peace.