The default view in the task pane shows tasks through the end of the week. Clicking the "Show more Tasks..." link will show tasks through the end of the month. Keep clicking to add another month!
Select Home > Tasks.
Enter a keyword or short phrase into the Search for tasks by title or description field to search for the task.
You can also search for tasks using the:
Advanced Search button: Search by title or description, task linked to, date range, or you can hide completed tasks to show incomplete tasks. Then click Search. To view completed tasks, set your filters and ensure the Hide completed tasks checkbox is unchecked.
Show tasks for others button: In order to find tasks assigned to a specific user, select the user from the drop-down menu, then click Administer.
Select the Task from the list.