Listing files containing all the words

To find files which contain all words in a set, you can use the below awk script. Here I am searching for files containing three words (word1, word2 and word3). The script output all filenames which contain all three words.

 find  -type f -exec awk 'BEGIN{word1=0;word2=0;word3=0}/word1/{word1++}/word2/{word2++}/word3/{word3++}END{if(word1>0 && word2>0 && word3>0){print FILENAME}}' {} \;

Reference:
1. http://www.linuxquestions.org/questions/linux-newbie-8/grep-an-entire-file-but-must-contain-multiple-words-705681/