If you are covering a particular event, it might be interesting and useful to have a flow in which everyone writing about the event is captured. In CrowdTangle you can do searches in much the same way as you do in TweetDeck or directly in Twitter. For example, you can search for P3Guld,#P3Guld,"P3 Guld" (comma between keywords/search terms) to bring up all open Facebook pages writing about P3 Guld (Swedish Radio's music awards for a younger audience).
Click on the Saved Searches tab and select New Search. Searches can then be sorted and filtered in much the same way as lists in CrowdTangle.
Once you have your list of search results, you can also filter the results further under the Edit Search tab, for example to remove keywords from your search results if your search ended up generating too many results, or by setting the language to narrow down the search results further.