Well, a little more context would be helpful. Is "You Know Nothing, Jon Snow" the name of a book and a movie? If you mean the quote from Game of Thrones, then you can just find the Chinese name of the series on wikipedia (first go to the English article, then switch to the Chinese article), and you can copy and past that into Youku or Tudou to find the show in Chinese, then find the episode that you want.
可能就《你什么都不知道,Jon Snow》。