On Saturday, July 23, 2011 9:47:26 PM UTC-4, Ialejandro wrote: 
>
> Solved, wrong syntax xD
>
> Another doubt is there a way to generate the results like google, I mean UL 
> of headers and for each header a short preview of the article?

 
If you want to do true full text search, you might consider a dedicated full 
text search server. PostgreSQL (
http://www.postgresql.org/docs/8.3/static/textsearch.html) and SQLite (
http://www.sqlite.org/fts3.html) both include full text search capabilities. 
Whoosh (https://bitbucket.org/mchaput/whoosh/wiki/Home) is a standalone 
Python search engine. Other (non-Python) options are Sphinx, Solr, Xapian, 
and Elastic Search. Another option is a hosted search service like IndexTank 
(http://indextank.com/).
 
Anthony

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