How only see the own content of the buttons after click the button ''show me all"?

hello I have a problem, when i click the button “show me all” i get all the elements but when I click any other button after that one I don’t get the content of only that button, how can I click any of the other buttons after I click “show me all” and only get the content of that specific button??
CODE IN CODEPEN
https://codepen.io/christian-amador/pen/MMKzJj