Making sure your listing is visible to buyers within Trulia's search results is the first step to making sure it gets noticed. The blog post below should be of some help in that area. Beyond that, photos can definitely make or break the deal. Properties that don't include photos, or those that include poor quality photos, are generally skipped over.
Your listings seem to have inviting photos and quite a few of them, so I'd focus on the other two tips to make sure your listings get more visibility in our search results.
I hope this helps.