Wiktionary
phr. (alternative form of how do you do English)
Wikipedia
"How Do" is a song written and recorded by American country music artist Mary Chapin Carpenter. It was released in April 1989 as the first single from the album State of the Heart. The song reached #19 on the Billboard Hot Country Singles & Tracks chart.
Usage examples of "how do".
But if the tenants are the reason public housing is in sorry shape, how do you explain what can happen when government gets out of the way?
You are given a scale and allowed to make just one measurement with it How do you tell which jar is contaminated?
If you are allowed to make just two cuts in the bar, and must settle with the employee at the end of each day, how do you do it?
Then how do they differ from men, or from human beings, if you prefer to use that term?