What I meant was that I was unsure if I understood your last question.
Great. Does it mean that first I have to create bookmarks for all text lines holding text content of the whole pdf if I want to search simultaneously in text and ind in the content? How can I do it automatically?
I thought you were asking how to search the bookmarks and the text simultaneously, to which I answered:
In my above screenshot there is a display of the options for the Find dialog. If you have all the options ticked off, include [page text, bookmarks, comments, form fields, external links] you should, as implied, be able to search all of those types of text and content simultaneously.
If you did not mean how to search both simultaneously, please clarify what the issue was, as I seem to have misunderstood what you are asking.