strange symbols while copying form PDF to Google or Word

Hi,

I can't copy text form PDF to Google or Word,

Strange, because yesterday everything was ok , but I added few notes, closed PDF and today when I copy anything, "raw-head" is pasted

I don't want to convert a document into Word because I'm editing this PDF, adding some notes

In the upper part of this document I still can copy text, so it seems that I must have changed some settings or coding in the lower part of it

I add print-screens so you can easy see the difference

please help,
best regards

thx for replay,

it's the only solution that works till now

best regards