Bing (no) search results for “box-reflect”

Apparently brave search gets a hard time yielding almost no relevant results with -webkit-box-reflect as well. https://search.brave.com/search?q=+-webkit-box-reflect

Edit: Google yields no results as well https://www.google.com/search?q=-webkit-box-reflect

I've concluded that the dash symbol most likely has some kind of operator role similar to double quotes for example.

Fails to produce any results although -webkit-box-reflect has been a thing for quite some time now.

Have you tried searching with no "-" at beginning?

Like just search "webkit-box-reflect"