FYI -- Trulia is not a real estate company or property management company. It just lists properties for sale or rent by individual companies or property managers. You can try searching for places under the "RENT" section. Then when you find something, you can scroll down to the bottom of the listing and find the contact info for that property.
But please beware of the many scams on here, and on sites like Craigslist. Typical scams involve a response from someone saying they can't show it to you because they're out of state or out of the country. They want you to send them $$ and they'll send you keys in return. DO NOT DO IT.
You should also try googling "Property Management Companies" in the area you're looking in. Also try sites like: