Here are some possible corrections and their meanings:
1. "Quel âge as-tu?" (pronounced: kel ahj ah-too)
* This is the correct French phrase for "How old are you?"
2. "Quelle est la date ?" (pronounced: kel eh lah daht)
* This means "What is the date?"
3. "Qu'est-ce que tu as?" (pronounced: kehsk tu ah)
* This means "What do you have?" or "What's wrong?" (as in an illness)
4. "Qu'elle est la cause ?" (pronounced: keh-leh eh lah koz)
* This means "What is the cause?"
Without more context, it's impossible to know exactly what the original phrase was trying to say.
Please provide more information if you can so I can give you a more accurate translation.