Fetching details from the dictionary...

to search for; to look for; to hunt for; to seek
to search (a house, pocket, etc.); to search through; to rummage in (e.g. a drawer); to fish around
鍵を探しているんですが。
I'm looking for my keys.
警察は犯人の家を隅々まで探した。
The police searched every corner of the suspect's house.
鍵を探していますが、見つかりません。
I'm looking for my keys, but I can't find them.