What is the correct grammar of saying what else could you ask more?

The sentence "What else could you ask more?" is grammatically incorrect. Here are a few ways to phrase it correctly:

Formal:

* What else could you possibly ask?

* What more could you ask for?

* Is there anything else you would like to know?

Informal:

* What else do you want to know?

* Anything else?

* You got any other questions?

The best way to phrase the sentence depends on the context and the desired tone.