It looks like you’ve provided a search string or a filter pattern, possibly for email searching or data extraction.
The Good: Finding your own company’s leaked data so you can secure it before a breach occurs.
yahoo.com: Tells the search engine to look for pages or files containing this specific domain.
-gmail.com -hotmail.com: The minus sign (-) is a "prohibit" operator. It instructs the search engine to exclude any results that mention Gmail or Hotmail. This narrows the focus specifically to Yahoo users or legacy databases.