Google search via AppleScript
Here's a subroutine for replacing characters:


on replace_chars(this_text, search_string, replacement_string)
  set AppleScript's text item delimiters to the search_string
  set the item_list to every text item of this_text
  set AppleScript's text item delimiters to the replacement_string
  set this_text to the item_list as string
  set AppleScript's text item delimiters to ""
  return this_text
end replace_chars



Source: http://www.macosxautomation.com/applescript/sbrt/sbrt-06.html

Between those two lines of AppleScript, insert the following:

set search to replace_chars(search," ","+")