You have to search with proper keywords. If you search with bitcointalk.to, definitely you will get only results of that clone website.
If you searched with "bitcointalk.to fake bitcointalk", I believe you will get a bunch of results with this issue.
Here is another one-
https://bitcointalk.org/index.php?topic=2991289.0https://www.google.ca/search?q=[Suspicious link removed]&oq=[Suspicious link removed]
You can add "site:bitcointalk.org" to the end of any google query to just search this site.
Yes, adding a tail with bitcointalk.org will work, of course.