I don't think you will ever get a 1:1 answer of a query that "works" in DDG/Bing but not Google, search is too curated. From my experience, when I am searching for what seems like a rare - but not completely unheard of errors happening in my code, on my sprinkler system, anything, it seems like the Google results are just crap compared to what the same query 5 years ago would have yielded.
I don't know what it is, if their algorithm is getting worse, or there is just too much shit on the internet to accurately index. From my experience, Google Search hasn't even just stagnated, it has gotten consistently and steadily worse for at least the last half decade.
Same thing happened to my Google Home, literally got dumber as the days went on, queries that it could answer yesterday, would just stop working the next day. I threw that thing in the garbage.