Advanced title search - AND not working for companies

Hi,

in the advanced title search, I want to display titles that two specific companies worked on.

This works great for names (using the "," in the URL) - displaying only titles, where name 1 AND name 2 are listed.

The same unfortunately doesn't work for companies. Here, it seems to be an OR-operator, displaying titles where either company 1 OR company 2 is listed:
https://www.imdb.com/search/title/?companies=co0747059,co0306771

Is there something I'm missing or is it simply not possible.. yet?