Hi I have just been to your website and tried a search for smtp.yourisp the result is from quite deep inside your website
http://eworldportal.com/search/searc...=10&option=any
So it looks like the spidering is going deep enough to find the results and I would expect that it may be caused by the length of the words "xp" perhaps changing the values in your config.php file down to minimum of 1
Perhaps define('SMALL_WORDS_SIZE',1); may well help it find the results, it may be worth a try?