I wanted to see articles that had no comments and no answers.  I did [this search](https://superuser.com/search?page=2&tab=Relevance&q=comments%3a0%20answers%3a0) and some of the results that came up had some comments.  The question that had comments was https://superuser.com/questions/1068175.  

Should I expect this kind of search to work?  Is there a work-around?