Thank you!
You could search for one page at a time and then remember the individual page addresses somewhere. Much like libraryofbabel.info and unlike the short story, this 3D version also "only" contains every possible page and not every possible book, so you won't necessarily find every possible text longer than a page in a single book in this library. I could theoretically add a bookmarking system for you to be able to save page the page addresses that you previously searched for, but I doubt that I will have more time to work on this project in the future to add new features.