I often see laments of "if only the search function was up" or "well if they had a search for the forums...." etc.
OK, here is how to search the paradox forums.
Open a browser. Go to www.google.com.
Put this as your first search term: "site:forum.paradoxplaza.com" then put in your search terms.
For instance to find an AAR for HOI2: Doomsday that mentions Bhutan click here: google search example