Finding partial pre-image of MD5 hash
Short answer: no you can't, MD5 is not that broken.

Long answer: if you really need to do that, a laptop i5 is able to try 5 millions of MD5 hashes per second; on average you will have to try 2^32 ~ 4300 millions hashes, so that it will be a matter of minutes on any decent remotely-modern CPU.