How do you find houses for rent? Or even duplexes or townhomes?

I have checked the usually places, craigslist, zillow, renterswarehouse, but none seem to have anything we are looking for in the right price range and we need to move by May. Are there any other places I can check? Are there certain newspapers or websites that anyone knows of, kind of desperate, I don't want to live in an apartment with my wife, my newborn son and little dog. By the way this is for minnesota, and if you have any information you need from me or I have questions can you please check back here if you leave an answer, thanks.