For your consideration, the Calvin and Hobbes Search Engine: https://michaelyingling.com/random/calvin_and_hobbes/

Edit to show example search for “freight train”: https://michaelyingling.com/random/calvin_and_hobbes/search.php?phrase=freight+train

I didn’t make this site, I just find it to be very useful for this extremely niche use case 🤣 Although, weirdly, it seems to be linking the wrong strip for this particular one. Dunno why, I’ve never seen it do that before.