Thanks for reaching out to the Adobe Stock community. I definitely understand your request here but we do not have the functionality available in Stock currently. Additionally, the keywords are matched based on the entry made by the contributor at the time of submission. Nevertheless, I would pass on the concern to our development team as a feature request.
Feel free to update this thread in case of any additional questions.
I would really appreciate the suggestion.
Is there also any way to suggest more photos of millenials with seniors as a father/daughter father/son relationship, or simply just a friendship? Searching stock photos you would think millenials and seniors don't exist in the same realm of existence (unless it's an older man dating a really young woman :/ ).
You can try a search like "father and son at table not child" or "father and daughter at table not child"
it's not perfect but it will get you better results. You might also try "elderly parent with child".