Poke about
Definition 1 of 2
Pro Tip 1/3Lack of Purpose
Used when someone is searching without a clear goal or urgency. 
He was just poking about in the attic, without knowing what he wanted to find.
Pro Tip 2/3Mild Effort
Highlights a gentle or half-hearted effort in searching. 
I poked about the room for my keys but didn't really think I'd find them.
Pro Tip 3/3Casual Investigation
Implies an informal approach to exploring or examining something. 
They poked about the flea market, hoping to come across some hidden treasures.