Searching this PDF using Preview is hopeless. Is it a bug in Preview or macOS? How can you get proper access to its contents?
Postscript
A single character text can result in a PDF file with 160 lines. Mojave still generates PDF according to the 1999 standard. And why extracted text is all over the place.
I’ve been using PDFs for over 25 years, and have finally abandoned using Adobe’s software. Here’s a little history, and the first version of a new free PDF browser.
Working with vector graphics is quite different from pixel-based or image formats.
Few computer products thrive for over 30 years: the Mac (31 years young), Unix in its many guises (46), and TeX (37) each spring to mind.
The Eclectic Light Company 