How to build a dynamic URL in a delivery

I am using a content manager URL to pull content into an email. A hard-coded URL works like a charm. I want to change that URL based on a field in my workflow and I cannot get it to work. For example:

The delivery html looks like this:
<HTML><HEAD>
</HEAD>
<BODY>
<P><%@ include file='https://www.google.com/coolstuff' %></P>

</BODY></HTML>

This works fine. But lets say I want the end of that URL to take you to a different page the html would look like this:

<HTML><HEAD>
</HEAD>
<BODY>
<P><%@ include file='https://www.google.com/targetData.variables' %></P>

</BODY></HTML>

This breaks the URL and renders nothing. 

What is the syntax I am missing? or is it even possible?