Content of all my keynotes not searchable anymore

I had 40 Gb of Keynotes on my old Macbook Pro. I cloned my old MBP to my new one and so far so good. But whenever I try to search inside the Keynotes via Spotlight, nothing pops up. This is driving me mad since it's crucial for me to be able to search inside the Keynotes.

I searched all forums and tried this:

1.Reset Spotlight

Via Terminal commands

2. Reset ALC

User rights were reset

3. Killed the complete index

Via +(add disk) in Spotlight via System Settings and then - (the disk)

4. Installed dedicated search tools

Installed easy find and FT Search, two professional tools that do raw search on any given file. Now it comes: these tools couldn't look inside the Keynotes either!

I fear that no one will reply to this problem since it's so specific. But if you have an idea to fix it, even the slightest, please reply.