Search Form Problem

Good day to everyone!

I created this form: http://www.freefromgluten.com/pages/advanced-search

I am a newbie and would like to ask for help. How can I make it display the results just like when using the search box in the header? Please see the code.

I hope that you can help me. Please see the code that I attached. Sorry if its a bit messy or messy at all. I created it through Dreamweaver.

Looking forward for your responses.

Marychris