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QUICK ANSWER
"Qué hay de nuevo" is a form of "qué hay de nuevo", a phrase which is often translated as "what's new". "Carlos" is a proper noun which is often translated as "Charles". Learn more about the difference between "Carlos" and "qué hay de nuevo" below.
qué hay de nuevo
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. what's new
Dime qué hay de nuevo, Pedro. ¿Cómo va el nuevo trabajo?Tell me what's new, Pedro. How's the new job going?