What you mean by minus operator? If one that exclude word from search results, you're wrong https://imgur.com/a/mOYUGsG
hacker news -site:ycombinator.com
office -microsoft
picard -"star trek"
japanese fish and rice -sushiI'll give them some credit though, using duckduckgo.com I only got a page full of Microsoft that shouldn't have been there. It looks like it's https://html.duckduckgo.com/html/ that has the blank page problem
Edit: To confirm, `office` alone returns a page full of Microsoft results.
If anyone from DuckDuckGo is lurking by any chance, I'd love to hear what makes it different.
Filtering retailers out of search results in Duckduckgo can be very difficult because of it.
An trivial example that springs to mind recently was trying to search for information on the manufacturer of Hycosan Extra eye drops.
The results are swamped by ecommerce sites with no actual information on them. Adding terms like "-pharmacist" or "-retailer" actually boosts sites with pharmacist in their URL to the top of the results.
I sometimes have the same issue searching for programming topics where the results are swamped by Microsoft related tech. That would be fine if that's what I was searching for but when it's not it's a real pain in the arse. Using "-microsoft" or some other exclusion just boosts the incorrect results from Microsoft's own site even further.
Sometimes Duckduckgo fix this behaviour but it seems to break randomly for me.