For it you have to make a strong and good research proposal to get attention of the Professors. Make one thing note, try to write a conceivable email because they receive 100s of email per day.
First of all take help of any professor in your institute. He can guide you to write research papers and give an idea to start your research path.
After getting a little experience of the research, you can continue your independent research and write one or two good research papers. These research papers will definitely help you to get admission into some Good institutes.