I just want to know the various topics on dissertation to select and proceed with my dissertation

This site will give you good ideas on topics as well as helpful tips --

Free Marketing Dissertation Topics (http://www.ivoryresearch.com/marketing-dissertation-topics.php)

My only tip is to be very careful which topic you choose. Over the months and even years, you will be eating it, drinking with it, and even sleeping with it, i.e. it will become the center of your life.