Search facility does not search text within embedded HTML using iframe

I have successfully integrated a Google Doc spreadsheet into the theme but notice that the search facility will not locate any text within the embedded doc - yet you can find the text doing a simply Ctrl F on the browser page - is it because the page is embedded? I really would like this to work.

Anyway here is the example page - try doing a search for 'floorstanding' (an example of what's in the list) and no results return.

http://premierconnect.com/hifi/?page_id=54