suggested is correct and it does work in both cases (search by context & going to profile where you can see all
... because initial request by you was
... refer to myself (canolradd) in the texts...
(highlighted is important)
And indeed when I search here there will be just two as depicted in the image you've posted
because there is either a quote (by you) that somebody posted or it is something like "hello canolradd"
Those are within the body of the message or reply to you
Say I found your post in "Submit applications..." as you mentioned , but your nickname is not present inside the message. The name at the right (poster name) does not matter in this case according to your criteria
Another point in order to search: see advanced search ; fill in "by user:" - your nickname
but in this case you need to fill in the text (specific word/phrase/ or, again your nick
as you requested) in "Search for:" (highlighted in captain's post)
Hope that helps