Sometimes we want to go see a specific post and we want to find it on our posts and we have to scroll it until we find it and is a bad user experience from my point of view.
Other times we just want to see the posts that were marked as solutions.
And other times we don't want to search by the comment but by topic/thread/question

The other thing I said about "make better the filters of the forum" on the title of this idea is, sometimes I am seeing my activity and I am going to use the search to find something and then when I click to search something on my activity it doesn't filter by my activity, but it gives me everything about that search that I made and retrieve all the data about what I wrote and I just wanted by my activity.
Let me know what you think
Marcio