var searchString = searchtext.toUpperCase();
        for (var ent in entLst) {
            if ((!$A.util.isUndefinedOrNull(entLst[ent].RECEIVED_DATE__c.toString() && entLst[ent].RECEIVED_DATE__c.toString().indexOf(searchString) != -1)) {
                filteredLst.push(entLst[ent]);
            }
        }