To Search Within Search Results To search within search results

[eskimmer 0]

Is there a good and efficient way of searching within previously searched records using PHP/MySql? I tried searching on google with several keywords like nested search, search within results, recursive search with PHP and MySql, haven't got a clue so far yet. But I thought it might be just storing previously queried sql statements and to a select on it each time the search button is called? Any ideas?