If a piece of content was published but never received any traffic, adobe analytics won't have a record of it. If this is your own content it could be easier to answer your question by looking at the content management system (CMS) you use. If you're using adobe analytics its probably AEM.
I am not sure if you are looking for an adobe analytics solution here, but there are social listening tools (both free and paid) that will help you search blocgs, forums, social posts and news articles on the mention of such content. Within adobe analytics, you will be able to filter out all your owned content tagged with analytics tags.