I'm using http://tools.wmflabs.org/quick-intersection/index.php to get a list of articles within categories but I have a list of over 35 categories and I'd like to use Quick Intersection to get the articles. Problem I have found, and perhaps I just don't know what I'm doing, but I can't seem to add multiple categories within the tool.
Every time I try and add multiple categories separated by a new line I get some strange articles. Any advice? Thanks