I regularly end up on the unofficial NixOS wiki (https://nixos.wiki/) instead of the official one (https://wiki.nixos.org/) when doing web searches. Today I to proomted out this little bookmarklet that takes me from the unofficial to the official one:
javascript:(function(){window.location.href=window.location.href.replace('nixos.wiki','wiki.nixos.org');})()
A bookmarklet is a web browser bookmark that runs JavaScript instead of navigating you to a website. To use it, create a new bookmark in your web browser and paste the snippet above into the URL field. whenever you click the bookmark it will run the code.
Btw, I was trying to find a way to set something up that does this forwarding automatically for me but couldn't find one that doesn't involve installing a browser extension. If anyone knows how to do it "natively", please let me know.
If you're using DuckDuckGo, you can also just add sites you don't want to see in your results to the block list. Other search engines may have a similar feature too
I run searxng locally and there is hostnames plugin ( https://docs.searxng.org/dev/plugins/hostnames.html ) to replace, remove or give high or low priority.