shit's broken
With DuckDuckGo you can set a specific date range to search, which doesn't always work but it often does
Keep in mind DDG censors "Russian disinformation" so it's not a great search engine for Russia-Ukraine war. It's still my default privacy respecting search engine though.
i didn't know how to do this, maybe i'll try it next time, but i think google is not being honest when it pretends that there are no results for pretty broad keywords but instead will show a full front page of results for different articles about one thing that happened in 2015.
If you think the issue might be censorship, Yandex will probably bump things that Google hides.
Ecosia seems to work nicely most of the time, but it pulls results from multiple engines. The key is probably going to be a meta engine like Ecosia. SearxNG is nice and its results are fantastic, but public instances are generally slow or unstable or both. If you have a web server, you could try spinning up your own instance just for yourself.
Been wondering what else to use. I tried Yandex but it wants you to complete a captcha if you're using a VPN and I couldn't find an add on that would bypass it