I moved off of gmail a few months ago, pretty happy about that but man duckduckgo fucking suuuucks. Really wish there was a nonprofit (with a strong privacy policy) wikipedia like .org solution that provided good results.
For searches in specific domains it is better to use bangs. For example prefixing with !py shows results from python manual.
Here's more about it: https://duckduckgo.com/bang
[0] https://hn.algolia.com/?query=cucumber%20chef%20salad&sort=b...
Upd: and https://github.com/asciimoo/searx
Liking it so far, really liking being able to attach my domains natively to my inbox