Refer:
http://demos.kendoui.com/web/grid/toolbar-template.html[
^]
add text boxin template and on entering value use JS to filter grid data.
var Grid = $("#Grid").data("kendoGrid");
$("#toolTipDiv").hide();
$("#toolTip").hide();
if (Grid != undefined) {
var filter = { logic: "or", filters: [] };
var filterInbox = { logic: "or", filters: [] };
$searchText = $("#searchbox").val();
if ($searchText) {
filterInbox.filters.push({ field: "AccountName", operator: "contains", value: $searchText });
var dSource = Grid.dataSource;
dSource.filter(filter);