Use the tasks search the same way you'd use a search engine.

Enter a word (or multiple words) that appears in the name of the task you want to locate. If you're looking for a task that contains the word phone, simply type 'phone' into the search box and then press the 'Enter' key.

You can make your search more specific using the search options. To see the search options, click on the arrow contained within the search box, and enter your criteria in the appropriate fields.

Advanced search operators are also available.