You can easily search for Tasks, Events, Lists or Tags using the quick search feature.
Tap on the looking glass icon at top right of the screen to reveal a Quick Search dialogue box. Start typing the name of what you are looking for, and as you type you will see a List of matches appear below. Once you see what you are looking for, tap on it to go directly to the item, List or Tag.
If there are too many results to show in the window, you can tap the '... more' link at the bottom of the list to view all results.