Hi,
With a two years bachelor's degree it's plain & simple "impossible". The only option for you is to go the way Enfield has suggested it.
Even with a three years degree, a bunch of university may allow you to go for a Master's course (two years) wherein they would add a few courses from the last year of their undergraduate program to your first years master's program or as people call it a "cover up year"..
Best of luck !