Here detailGrid is child grid. I can get selected rows from 1st detail grid. But in case selected row is from 2nd detail grid, its not showing the data.
var grid = $("#detailGrid").data("kendoGrid");
var selectedData = grid.select();
var items = [];
$.each(selectedData, function (idx, elem) {
items.push(grid.dataItem(elem));
console.log("selectedData.."+JSON.stringify(grid.dataItem(elem)));
});