Multiple Column search not working.
Multiple Column search not working.

Hello, i have tried many ways to search for multiple columns, like (column 1 = a AND column 2=b), i am trying to do multi-column search but it always search for single column, tried below methods none of them is working.
I am using server side data
Looped on each search field as below via looping column indexes
table.search("zaman").column(2).draw()
tried with hardcoding each field as a separate search
$("select[name='sdistrict']").on('change', function () {
var SearchedVal = $(this).val();
table.DataTable().columns(6).search(SearchedVal).draw();
table.columns(6).search(SearchedVal).draw();
} );
via hardcoding each field as below
table.search("zaman").column(2).draw()
this only works and get results but not for all fields it is showing result for the column i am typing on.
Please suggest.
(please note that i have fields separate then table, not in footer and not in header i have placed fields in a separate container, so i would like to search for those fields based on their ids and classes)
Thank you