DDG's quality actually decreased in the past year as now they seem to ignore explicitly required stuff in a query quite often. It used to be you just used quotes and got what you wanted, but these days that might get ignored. "-" for excluding similar popular words also seems to have stopped working.
I thought it was just me remembering incorrectly if DDG supported quotes and includes. Could have sworn this worked before. Thanks for confirming you're also having this problem.
https://duckduckgo.com/?q=c7+c8+extension+cord+%221m%22&t=h_...
let's force the titles:
https://duckduckgo.com/?q=intitle%3Ac7+intitle%3Ac8+extensio...
That's completely broken, the titles contain none of the three things asked for.
yeah, I am not hopeful with duckduckgo either. I mean, Google is just as bad but I am pretty dismayed by the results these days.