grep for two words in the same file

Let's go for some more csv (or any text file) fixing, grepping and slicing and dicing.

The problem is simple:
Find a file (among a vast amount of them) that contains 2 or more words, not necessarily in the same line.

That makes piping greps onto other greps useless. The solution is quite easy, but it might not be obvious:

grep -l word1 **/*csv(.) | xargs grep -l word2 

Thanks for watching.