1. As a polite way to decline something:
* Example: "¿Quieres un poco de pastel?" (Do you want some cake?) "Nada de que, gracias." (No thanks.)
* This essentially means "Nothing of what you are offering, thank you."
2. To express a lack of something:
* Example: "No hay nada de que preocuparse." (There's nothing to worry about.)
* This means "There's nothing of what causes worry."
3. To emphasize the absence of something:
* Example: "No tengo nada de que hablar contigo." (I have nothing to talk to you about.)
* This means "There's nothing of what I can talk to you about."
The exact meaning of "nada de que" depends on the context of the sentence.
Let me know if you want to see more examples or have further questions!