What sort of queries are failing for you? My e-mail address is in my profile - I'm doing some research (for Google) that's along the lines of "exploratory questions", and additional use cases obviously helps.
I think a lot of it is that most topics outside of programming/tech have information locked up in books or other non-free things. For instance, I can't find a decent, in-depth article on how to make my own leather from deer hides. There are lots of general howtos, but many of them hint that the difficult and special knowledge is available in these books.
Maybe it's just that other knowledge areas don't just put every little thing on the web to be indexed and easily searched, or maybe I just grock programming well enough to read between the lines and follow implications, I don't know.
Just today there were two things I couldn't find with Google:
Finding how/why the lighting switch on a gas stove could cause a (mild) electric shock. I read the first 3/4 pages of results, got one or two very low quality forum postings and that is all. Somebody in the world must have written about this problem, e.g. in a manual for gas repair engineers. Google didn't find it.
Where wild ducklings sleep at night. I found lots of articles about how to look after pet ducklings, which aren't relevant. I found one article about how wild adult ducks sleep at night, although it was in my view of dubious provenance. Nothing about wild ducklings. I spent only a few minutes searching as I was using my mobile phone (in a park), so had higher needs for finding the answer in the first few results than the above.
I suspect that people get different experiences of google according to: a) what kinds of knowledge they tend to search for, b) their skill at using it.
I increasingly find myself using Quora, and asking new questions on it, for the kinds of queries above.
