The list:[handle]/[list-name]
is a filter
operator and not a Boolean argument, therefore impossible to use twice (two list filters) in the same search.
Depending on what you wish to do with the results of such (necessary) two separate searches, you can merge their respective results into one unified place like another Tweeter feed or a designated Google Sheet using a free web automation service like IFTTT.
You'll need to create two separate IFTTT recipes. The first will have as trigger a Twitter search for the list:NASA/astronauts-in-space-now
, the second will have as trigger a Twitter search for the list:NBA/ESPN
.
For both recipes, use the same Google Sheet (new line) or Twitter Account (new tweet) as an action, and throw the content triggered by both recipes into a unified table / account.