Turning up often means arriving or appearing, especially after a delay or unexpectedly. It can also mean increasing a setting, like volume or heat, or making things more intense.
I hope the fact-checkers are turning up the volume and really working hard. Donald supported the invasion of Iraq. Hillary Clinton
Birth order effects are like those things that you think you see out of the corner of your eye but that disappear when you look at them closely. They do keep turning up but only because people keep looking for them and keep analyzing and reanalyzing their data until they find them. Judith Rich Harris
I ask people impertinent questions. Hopefully turning up pertinent answers. Jim Butcher
Democracy is not just turning up to vote every five or four years, it's much more than that, it's a way of life, it's giving power to the people. Hugo Chávez
I sometimes have a horrible fear of turning up a canvas of mine. I'm always afraid of finding a monster in place of the precious jewels I thought I had put there! Camille Pissarro
All sorts of computer errors are now turning up. You'd be surprised to know the number of doctors who claim they are treating pregnant men. Isaac Asimov