[PHP-DB] Search results of a previous query?

[Lic. Carlos A. Triana Torres]

Hi all,
    I am trying to build a script to make "nested" searches in a table. I have a form 
compossed of a text field and a select dropdown menu with all the fields in the table. 
The user can write in the text box and then select the field in which to perform the 
search. This works fine so far...now, I want to show the results of the query, but 
give the user the possibility of searching again BUT only make the search with the 
results shown, not the entire table....can anyone give me any ideas of how to do this 
last part? I tried passing the new queries in the url...but this won't give the user 
the possibility to search twice in the same field...
Any ideas? Thanks before hand.