My dog doesn’t understand the words “come here” but clearly understands the words “are you hungry.”
The words "are you hungry" are also linked to the sound of any food wrapper being undone. Open a bag of chips and watch what happens. :-)
Our last dog would come into my (home) office and stare at me. It was the “I need to go outside” stare. I would tell her, “if you want to go outside, go see mom”.
She would then turn around, walk away, and a few seconds later I’d hear my wife, “oh, you want to go outside?”...and would let her out.
...like clockwork :) I still don’t think my wife knows I was doing it :)