Tom Smith at The Right Coast is testing a new search engine and is asking constitutional lawyers and scholars to help him out by suggesting search strings:

I am testing a new kind of legal search engine, and I need lists of ideal search results to help. So, if you were searching for US Supreme Court cases on a given topic of law, using a search engine as you would if Google worked on case law, you would use a search consisting of a number of terms, and you would get back a list of cases.

The formatting seems to be a bit askew in the linked post, so make sure to scroll down to read the whole post.