Hello @kartik,
Just pass it like a normal jQuery ajax in POST fashion.
The structure should look like this:
ajax: { type: 'POST', url: <path>, data: { your desired data } }
Example:
var $table = $('#example').dataTable( 
    "processing": true,
    "serverSide": true,
    "bDestroy": true,
    "bJQueryUI": true,
    "ajax": {
        'type': 'POST',
        'url': 'getResult.php',
        'data': {
           formName: 'afscpMcn',
           action: 'search',
           // etc..
        },
    }
});
In PHP, just access the POST indices as usual (just the straightforward approach):
getResult.php
$form_name = $_POST['formName'];
// the rest of your values ...
Hope this is helpfull!!
Thank You!!