In response to your question, the answer generally is "no". You can attempt to hire an agent to represent you, but the agent has the right to refuse if they don't feel you have anything they can actually sell. Your first priority, therefore, would be to make sure you have something to sell.
I can appreciate the fact that you have gone to the trouble to self-publish your book through CreateSpace and Lulu but haven't seen any sales. My question would be to ask what you are doing to promote your book and let people know it is out there? If you are promoting your book, even if it means driving them to the free version on your web site, then in time you should start seeing some sales (assuming the book is of interest and is written well). The main thing is to be patient, because unless you are doing a ton of promotion, it is highly unlikely anyone will even know about your book or be able to find it.
Another option you might consider is to use the Kindle Select program. If you publish your book as an e-book through Kindle (Amazon), they will offer you the option to join the Kindle Select program. This means you can have your book made available through the power of Amazon advertising, and they will let you choose five days on which to make your book free. I know several people who have done this to generate interest, and then once the book was no longer free, they had enough momentum and word of mouth to start seeing some actual sales.
The downside of this program is that they ask you to remove all other avenues for purchasing your book while you are in their program. That means you can't sell your POD versions and you won't be able to offer it for free on your Web site. Personally, I sell more books through B&N, so this option doesn't work for me. However, a new writer with their first book might be able to use it to their advantage.