distance between words

[YourSoft]

Hi,

I have a suggestion to improve nutch search results.
The "big" search engines (like google) measure the distance between the 
query words.
E.g.:
query string: lucene in action
When you search for it in google, google will boost up that documents 
where the "lucene in action" is in the same sequence.

I think it is possible in nutch/lucene (e.g. if your search string is: 
"lucene in action"), but nutch don't make it.

Any ideas how to make it?


Regards,
      Ferenc