How can I submit Keyword in google webmaster?

I am using blogger, and last few days ago i had changed or custom my bolgger domain to .tk domain. i have also using google webmaster tool. here keywords is empty and it shows, "no data available'. i would like to mention that i am using google webmaster tool 1st time and i am totally new with this webmaster tool. So how i can create or generate or submit keywords in google webmaster tool?|||http://www.google.com/support/webmasters鈥?/a>|||http://www.bloggertricks.com/2010/02/fre鈥?/a>