Smart Search within Elastic Search like Google

Question

I want implement smart search like Google in my web site.

So for that we are using approach like below link

http://www.anotherchris.net/csharp/how-to-write-a-spelling-corrector-in-csharp/

In that we are using a text file but it is very small collection of words.

It's correcting small and easy words but it fails in complex words.

So please any one assist me to use words database using any api at the place of text file.