Specialised search engines are getting better. i use github search for code search, and sometimes stackoverflow search for technical questions.

i have a directory of duckduckgo !bang operators, for easy access https://mosermichael.github.io/duckduckbang/html/main.html

This helps to find the specialised search engine, if you need one. (it scans duckduckgo for any new !bang operators, in a nightly built, here is the script: https://github.com/mosermichael/duckduckbang )

I suspect, that most of these specialised search engines are powered by elasticsearch. It may be, that elastic is starting to cut into google search, from the low end.