You have to change the option within the actual code you added. Be careful though. I'll assume you have no knowledge of PHP so just look for a list kinda thing. It'll be numbered from 1-3 by default. Then below that is a variable. If you want it to search google you select the number that google is in the list:
PHP Code:
// selete the number from above of the site you want to search
$chooseoption = 1;