Having a problem creating a back link

I am trying my hand at this and so far I $ uck I am trying to make a back link from Tumblr to a site.google.com that points to my money site. Problem is I can't get the link to work with the Site.google.com to work..

This is what it looks like <a herf="your website URL>my key word</a>

I can get the link right when it's straight to my website but I seem to have a problem making it work with the site.google.com

Any feed back would be great