如何根据此代码搜索数据表的多个列？

Question

DataTable能够创建。现在我只能搜索名为＆＃39; No＆＃39;的列。我的要求是搜索数据表中任意数量的所需列。这样做有什么问题吗？有人可以帮忙吗？

dmhTable = $('#tableId').dataTable({
        "bProcessing": true,
        "bDestroy": true,
        "bServerSide" : true,
        "bLenthChange" : false,
        "iDisplayLength" : 10,
        "sAjaxSource" : "searchHistoryByFromAndToDate.html?fromDate="+ $('#txtFromDate').val() +"&toDate="+ $('#txtToDate').val(),
        "oLanguage" : {
        "sSearch" : "Search"
                      },
        "aoColumns" : [{"sTitle" : "Sl No","mData" : null,"aTargets": [ 0 ],
        "fnRender" : function(obj) { var columnIndex = obj.oSettings._iDisplayStart + obj.iDataRow+1
                                                   return columnIndex;
                                   }
                       },
                       {"sTitle" : "ID","mData" : "ID", "bSearchable" : false,"bVisible":false},
                       {"sTitle" : " No","mData" : "No", "bSearchable" : true},
                       {"sTitle" : " Type","mData" : "Type", "bSearchable": true},
                       {"sTitle" : "Message","mData" : "Message", "bSearchable": true}
                      ],
        "fnServerData" : function(sSource, aoData, fnCallback) {
                $.ajax({
                        "dataType" : 'json',
                        "type" : "GET",
                        "url" : sSource,
                        "data" : aoData,
                        "success" : fnCallback
                      });
                   },
                        "sPaginationType" : "full_numbers"
                      });