EBay does do search well. Exact phrase matches, negation, ORs

A search for this works exactly as you expect:

(Lamborghini Urus, Audi RS Q8, and Volkswagen Touareg) “stereo wiring harness” -untested

It’s gotten a bit more fuzzy if you do something wrong. I used to have an alert for a mis-spelled brand name to snipe stuff :)