Finding porn without performer names or even part of a title is mostly futile.
If it is a popular film, with big name performers, then you'll likely come across it at some point, either by using relevant keywords, performer names, or a word in the title, or by chance while browsing a specific genre/style.
But I have had the same problem as you, with many films that have no name performers in them and also, when the scenes are nothing special or they do not stand out in any way. Porn is poorly catered for to the consumer, because of its nature, the iffyness (at best) of most of the people in the business, plus all the websites and of course, its long history.
Even the databases, iafd and egafd, are not 100% reliable. They are often wrong in the title, release year, have spelling errors, wrong people in the scenes, fake titles and durations depending on which version you get.
So consumers cannot rely on anything or anyone in this space, for anything.
Added to this is the fact there is such a colossal amount of porn on the internet (both old and current) that scything your way through what you don't want to get to what you do want can be very exhausting, time consuming and dispiriting.
I still have many hundreds of films on my wants list, all with titles, the year, the studio and performer names, but I just cannot find them. I have searched for them for many years now.
Added to this are many videos which I have seen in the long past but which I foolishly never kept (VHS tapes) and I have only vague memories of the contents and/or the performers.
I eventually came to a place in my mind, where I decided that making the effort wasn't worth it and that if I happen to come across any video that I am looking for, all well and good. Otherwise, it wasn't worth the aggro. Yes, there are particular films, performers and/or scenes that are super, super, sexy & erotic, "different" and hit a nerve with me. I keep all such films in my wants list.
I saw a video in the 1980s, which I thought was a clip. It featured a small Asian female, who is at home and needing to got to the bathroom. But her boyfriend is showering so she waits for a bit but then can't hold it any longer and goes in to pee. While she is peeing, she sees her boyfriend washing and also sees his cock and starts to get horny.
Eventually, they start fucking and after short time, he goes to fuck her ass and she says "Oh, yeah, top floor here we come". Then he says "Its a little tighter than the other one". So these images and those two lines stayed with me. I searched over the years but found nothing.
A couple of weeks ago while searching again, I came across a description of this scene and the female's name. By identifying the likely guy, I eventually found out the scene was in a video called Deep Passage 1978, which is a group of 5 scenes not an actual film.
The quality is poor, the sound is wrecked and the dialogue is beyond abysmal. But I found it. To be honest, its not as great as I remembered it, probably because my experience of watching anal sex up to that point was new-ish and so, such scenes made more of an impact on me. Now that I have seen a huge amount of anal sex, this scene is tame by comparison.
So, you can get lucky and find what you want but you may have to wait a long, long time.