How do I pull single pages from a multipage document and keep it searchable

I have documents that could be 100 pages long with several versions of the same 'view'.  I need to search just one version.  We used to have seperate documents for each version and this made it simple, but we are 'making things better' and craming everything into one document now, making it difficult to work with. I can open the document multiple times, but I can't lock to a single page - or better yet- area of a page leaving me with multiple occurances of the same 100 page cluster.  Of course I'm only given the free reader version, or again this would be simple. I just want to open single pages of a searchable document.  I'm very frustrated- please help.