Escape Sepecial character from seaching

Hi,

I'm trying exclude or escape secial character when we search the keyword without special character.

Our find index repository contains special characteralong with text, for example the trade mark symbol ®. 

Scenario:

My search and navigation repository contains trade mark symbol, but we may not expect the user to type in the trademark symbol on search.

Example

Serach repository Content : Product® Title

Search term:Product Title

With the above case I'm not getting results, So I need to programatically escape the trademark symbol when we search from the content, Also may not be able to remove the Trademark symbol from the repository.

Anyone have experienced the similer situations? any suggestions ?

Thanks in advance, 

Hari