Google does not provide a mechanism for webmasters to get changes into the Google index immediately. Any changes you make will take at least a day or two, and in some cases as much as a couple weeks to get indexed.
Google does this because it makes it harder for black hats to test out techniques for ranking better. When changes take a while to be reflected in the index, the hackers don't have as much time to try out as many things.
"Fetch as Google" and "Google Ping" are the best you are going to be able to do. Those alert Google that there are changes. Google may take a while to act on that information and update the index.