Pretty sure you’re talking about the Svalboard. I don’t think it uses chunks of words though. Each finger has access to 5 keys and you can map any layout. svalboard.com

But maybe you’re thinking of stenography where you have fewer keys but you press them in combinations (chords) instead of individually. That looks crazy fast. youtu.be/7jVXrX5TDk4 www.artofchording.com/introduction/#stenography