将多个角度模块/控制器注入同一页面

I am trying to inject a new angular controller into a drop down menu, which is in a view primarily populated with another module and controller. So far it does not work, and I do not know why, necessarily. I am not using routing or anything like that, purely calling the controllers and modules in the html.I am not too sure where else to look. Currently, I am injecting ng-app into a div wrapper, with different locations. However, this does not allow the angular controllers and modules to work in unison Here is snippet of my code:I am trying to inject a new angular controller