Ferret out
Definition 1 of 3
Pro Tip 1/2
Persistence Needed
The phrase implies diligent searching, sometimes over time, not just casual looking. She had to ferret out the old receipts from piles of documents for hours.
Pro Tip 2/2
Metaphoric Use
'Ferret out' can be used metaphorically for non-physical search, like uncovering facts. He was determined to ferret out the origins of the rumor.