audio explanation for ( vocabulary - new words)??

Hi all,

could anyone help me to find

audio lessons ( audio explanation ) for ( vocabulary - new words )??

Im looking for hiring private teacher online for that to give me this kind of lessons, but I told my self first to ask you especially that I found your form the first one in alexa.com

years ago I found those lessons in voice of america programs, which give complete conversation first, then they explain the conversation part by part. but I cant find it right now.

so, could any body saw over the web what im talking about?