Sometimes the specific text is currently "checked out" by other users. In that case, try these related searches on Archive.org:
If you still want the Archive.org link, search for "El tallador de diamantes" archive.org but understand the legal gray area. Many editions on Archive are listed as "No copyright" but that is often incorrect. el tallador de diamantes pdf archiveorg
Would you like a summary of the book's key principles (the "Diamond Cutter" system) while you search for the PDF? Sometimes the specific text is currently "checked out"