I am a bcom graduate with a work experience of 8 yrs and above.I am looking to change my job by studying further?

There are various options that you can consider while you decide on studying further:

PG courses in management
courses in finance

While you decide on what course to take up its very important that you are interested in it.

Its also advisable that you go through http://www.youngbuzz.com/careers/career-options  and check which careers
appeal to you.

Hope this helps.