search for music using your voice by singing or humming

http://www.midomi.com/

I successfully searched for "how do i live" with my voice but it was like 3rd attempt as my English speaking skill is below average.

My purpose was actually to search for "Guantanamera".  I couldn't find it from googling as I thought it was "guan-ga-ta-me-ra".  I tried midomi with my voice and failed all the time too.

Finally, I found a trick by opening the music with speaker and I pointed the microphone to it.  Yes, it worked!