I have no experience in handling raw PDF data, but as a user, I sometimes notice that the computer is not reading the PDF text the same way as I'm reading it. H

I have no experience in handling raw PDF data, but as a user, I sometimes notice that the computer is not reading the PDF text the same way as I'm reading it. Here are a few examples: 1. When searching (Ctrl+F) a commonly used phrase that occurs multiple times in a PDF, some occurrences fail to show up because of line breaks, accidental hyphenation, etc. 2. Once in a while, I come across PDF files where searches for words containing "fi", "ff", etc. fail because of some insane ligature glyph replacements. 3. Some PDF files that have a two-column layout for text still treat lines across the two columns as one line. Search fails again.