Filtering out most similar nodes

My situation: I have a site with numerous "resources," and the pages within each resource all have very similar tags. In this case, it's not useful to have these similar pages returned because it just looks like a table of contents when it does. I've been playing around with Views quite a bit but am not finding a way (through Arguments or Filters) to filter out all the pages within a given resource from being returned by Similar by Terms. I'd like to be do this through the url path, if possible, because then I could do the filtering dynamically without having to create a new view for each resource.

So, I'm wondering if there's something I might be missing here.

Thanks!