Microsoft Edge extends tools for the PDF reader

Dear Sir/Madam

I am in the process of conducting researches from a book which I have downloaded in both word and pdf formats. My researches require me to extract the contents from the book to include 2 groups or strings of words from some relevant text.

The following are 2 examples:
Example 1
First group (string): not only
Second group (string): but also
Relevant text 1:
He is not only intelligent but also funny.
Relevant text 2:
Mr X is not only an actor but also a philanthropist.

Example 2
First group: scarcely
Second group: when
Relevant text 1:
I had scarcely walked in the door when I got an urgent call and had to run right back out again.
Relevant text 2:
Scarcely had the teacher seen the student when he started studying.

My question is, how would I be able to extract the relevant text of the desired strings of words which are normally consisted of 2 groupings as demonstrated in the above 2 examples. Preferably, I would like to receive instructions on how to do so from both a word document and a pdf document.
I would like to thank you in advance.

Regards
Preston Chow

Elliot Kirk