> Other services (Facebook, Bing, Yahoo!, etc...)?

Actually when you read the actual news[1] and not the clickbait rehashed version that has been posted to HN you'll learn why it only targets google:

  The Edina Police Department figured out that while
  searching Google Images for the victim’s name, they
  found the photo used on the fake passport, and 
  investigators couldn’t find it on Yahoo or Bing. 
  So, they theorized the suspect must have searched 
  Google for the victim’s name while making the fake 
  passport.

[1]: https://tonywebster.com/2017/03/minnesota-search-warrant-any...