Fetching details from the dictionary...

to feel around for; to fumble for; to grope for; to search for; to look for
to investigate; to probe into; to spy on; to sound out
to explore (parts unknown); to enjoy (natural beauty)
彼は暗闘の中でスイッチを探った。
He felt for the switch in the dark.
相手の本音を探るのはなかなか難しい。
It's hard to probe the other person's true feelings.
警察は事件の真相を慎重に探っている。
The police are investigating the truth of the case.