snoop into (something)
To investigate, pry, or inquire impertinently into something. Please tell me that the cops won't find any incriminating evidence if they start snooping into our financial practices! I started snooping into the senator's campaign records and discovered a vast conspiracy of fraud and embezzlement.
snoop into something
to pry into something or someone else's affairs. I wish you would stop snooping into my business! Whose affairs are they snooping into now?