As good as Trulia is, they are still not as good as the MLS from this region. Trulia and all secondary search engines will never have complete, accurate, up-to-date information on homes in this area. To give you a general idea of what's "out there," it's great! But if you want FULL information, photos, details, features and descriptions of homes in the greater Phoenix, you will need to secure the services of a Buyer's Broker Realtor who can then set up a customized search for you.
And yes, Dana is correct! RealtyTrac is much more confusing than helpful.