"Te ismersz egy jó iskolát?"

Translation: Do you know any good schools?

[Brimbalicious]

I would say "Do you know of a good school?" or "Do you know of any good schools?"

[Liggliluff]

The first one might be correct, but the second one is in plural and has a different meaning (compare wanting one example or multiple examples)

[Patricia460976]

The first one is correct.

[FrancisIlMulo]

What's the difference between "ismerz" and "tudz"?

[Judit294350]

Tudni is to know how to do something. Ismerni is to know (ie be aware of) a person or thing.

[Simon_S.]

Igen, Hogwarts jó iskola