Remove or replace some text in PDF file

[duchiep123]

Hi everyone, I want to delete some text from the pdf file. My original idea was to place the image to cover the text but it can still be copied

I have read a few cases like
#71

I still don't see a complete way to delete or replace text.
Has anyone done successfully delete or replace the text in the pdf file ? If so, please tell me how to do that
I really need it
Thank you so much