Search button not finding from pages

Theme: Twenty Eleven
Link: http://siamgroceryav.com/index.php/seafood/

So when you look at the pictures from the link I have given, those are some items that we have for sale. The thing I am confused about it when I use the search button to look for a fish lets say “Red Snapper” it will give me a “No results found.” I have already placed the name on Text, Alternate Text, Caption and some on description but still no results on search. Is there anyone that can explain to me how I can get this fixed so when I have all the things uploaded to my site customers can search instead of looking for items one by one.

Thanks