sniff around (something)

Translations
вынюхивать (что-то)
He was sniffing around the office, trying to find out who leaked the information.
Он вынюхивал в офисе, пытаясь выяснить, кто слил информацию.
Definitions
To investigate or look for information about something, often in a secretive or curious way; to explore or inquire, sometimes with the implication of being nosy or intrusive.