Trying to grow your Twitter following? Twitter has it's own search options, but once you are tapped out of relevant results, turn to Google's advanced search options:
Using the "site:" parameter, Google will only return results for a specified URL. In this case, twitter.com. I also noticed that all twitter lists contain "/lists/" in the URL address. So I added the "inurl:" parameter to make sure my Google search results were returning only Twitter Lists. Then, just follow that up with your main keyword. I replaced "topic" with different marketing keywords such as "ppc", "ppc marketing", "google ads", "marketing professionals", "keyword marketing", "seo", "seo marketers", etc. I found huge lists of marketers that have been to various events/seminars and used twitter lists as a networking tool to stay connected with peers they met along the way.
site:twitter.com inurl:/lists/ topic
If you want to learn more about Google's advanced search options, check out these resources: