How to find files that have 2 words in the content?

Question

bash

Good day to all.
There is an archive of mail for 4 years. You need to find in it letters sent from a specific box to a specific one. As I understand it, the easiest way is to search by content using the same grep.
But how to set a command to search the entire file using 2 expressions? By simply passing arguments through "-e" I will make it search line by line, but the expressions may occur on different lines of the file. Please help.

Answer 1

grep --max-count=1 -z -l "СЛОВО1.*СЛОВО2" ФАЙЛ1 ФАЙЛ2 ...

Answer 2

Search by the first word, make a list of files. Similarly, search for the second. Find matches between lists.

Answer 3

grep -l -R test1 *| xargs grep test2