[MichaelDickens]

Maybe the solution is something like a search engine aggregator? A website that sends your search to both DDG and Yandex and shows you the top 5 links from both, removing duplicates. That way if something is censored on Yandex or DDG but not both, you'll still see it. Something like that would be non-trivial to implement, but a lot easier than writing a new search engine.

[callalex]

Dogpile has been around since 1996. Now I feel like an old greybeard ;)

[nioj]

You could try something like Searx which is an open source metasearch engine. You can host it yourself if you want to.

Here is the wikipedia page for it: https://en.wikipedia.org/wiki/Searx