It's weird but typing “the1975..com” (note the extra dot) in the Google app will show all your personal text message in the search result in most of the Android phones.
This latest bug in the Google app is seen in most of the Android phones. It shows only in the Google App not in Google Chrome app so just check out in your phone’s Google app if it shows your personal smses in the search result.
The messages will only appear if you have given permissions to access SMS messages according to the report. However Google has not yet commented anything related to such bug.