I‘m using DDG most of the time but when I have to use Google hoping the results will be better, I try to specify words that need to be in there. However, the more niche your problems are, the less you will find.
They claim to be running their own search engine, never checked out for me.
More covered here:
https://news.ycombinator.com/item?id=4817576
Anyone seeing them crawling your site?
Is bing the best alternative? I've seen some pretty compelling evidence DDG copies / uses / has a deal with bing.