search option

Sure, plenty of people know how to code a search engine for a website. But your question is like this one:

"Anyone know how to build a car, please let me know."

To summarize, you have to either have dynamic coding for your site, or a remotely hosted search service.

The remotely hosted one is the easiest for those who do not know how to write the code and you can find the main services here:

http://search.able2know.com/Web_Development/Remotely_Hosted/Site_Search/index.html