I should also add that we do have some specific intelligence around "popular names" for some legislation. For example, the term "Obamacare" never appears in the text or title of the big health care reform bills of 2010. However, a search for "obamacare" will return PPACA and the accompanying Reconciliation Act:

https://scout.sunlightfoundation.com/search/federal_bills/obamacare