Yeah it's not quite the sort of query it's good at. It's more geared toward discovery than answering questions. You can answer that particular question if you tune the query a bit though.
You're right. It works better when I think "hard keyword search" than what I'm used to with DDG and Google. I tried "python super classmethod" and got here: https://legacy.python.org/dev/peps/pep-3135/ which perfectly answered my question.
https://search.marginalia.nu/search?query=python+datetime+un...
Has this as the first result, though:
http://www.logophile.org/blog/2010/08/15/python-datetime-con...