multiple entity and fields to be searched in a directed way

Hi All,

Here is what I should be building  in a single screen  ( I cannot think of any standard way to do this, can you ?  ): 

Entity 1

   Field 1 : input for search criteria    Field 2: input for search critera

Entity2

 Field 3 : input for search criteria  Field 4 : input for search criteria 

Result grid for Entity 1

...

Result grid for Entity 2

...

What approach should I take?  

many thanks,

in advance !