Argh, that's frustrating, I checked 4 of them and thought it was fine.
The problem is that there seem to be many classifications of remote code execution including buffer overflow and "code injection" and you can't choose multiple. :(
Yes, I also was surprised that the search didn't have more useful tools (e.g. search by high ranking in individual factors, or even just sort by severity: confirmed RCEs should all by very high)
https://nvd.nist.gov/vuln/search/results?form_type=Advanced&...
I'm not saying none of the results from your search are RCEs, but not all are, and many are fairly speculative.