trying to read archives

I've been trying to read archives of posts that are more than a few months old but less than several years old. I have not yet been successful. For example, if I go to the recent archives and search a user name, and then try to read all of that user's posts, it only shows 200 total.

HOw might I do this - Find posts over six months old but less than 2 or 3 years old?
Thanks