serch in blog - What is the best method.

If you are 'completely new', pick up a book or read some tutorials more.

Secondly, Ferret (and acts_as_ferret) are a nice solution or http://
railscasts.com/episodes/37

Cheers,
Zach Inglis
→ Blog -- http://www.zachinglis.com
→ Company -- http://www.lt3media.com
→ Portfolio -- http://portfolio.zachinglis.com

I was asking about the implementaiton part of the...

no way.

Dint find any thing related to search.

certainly, you've been searching wrong internet.