Here's a breakdown of the potential issues:
* "Bonjour" is correct French for "hello".
* "Ce" means "this" or "it".
* "Vu" means "seen".
* "Plauy" is not a recognized French word.
It's possible that the intended phrase was something like:
* "Bonjour, je vous prie" which means "Hello, please".
* "Bonjour, je vous en prie" which means "Hello, I beg you" or "Hello, you're welcome".
* "Bonjour, c'est vous, s'il vous plaît?" which means "Hello, is that you, please?"
Without more context, it's difficult to decipher the exact meaning of the phrase.