These days everyone with a internet connection is familiar with search engines. We use them every day.
We can use Google to search for Images, Discussions, News, Videos and so much more. With DuckDuckGo your search results are combined with the social network aspect.
All kinds of search engines but no comment search engine
We all have a account on a social platform like Facebook, Myspace, Google+ etc. So I went to Google and I searched for Comment Search Engine. A lot of items appear to my monitor but not one is a full independed Comment Search Engine.