As he said:

„Snowden claims that he‘s won and that his mission is accomplished. If that is so, I call on him and his accomplices to facilitate the return of the remaining stolen documents that have not yet been exposed to prevent even more damage to U.S. security.“

While some may claim that this is just a passing phrase, this is a written statement from James Clapper to Congress, meaning it was vetted many, many, many times, and the word choices are clear and specific.