The in-built Blogger search engine is the most useful tool for finding a specific file. It is located in the upper left hand corner of the webpage, and within the white box type in either the name of a composer or work and press the section marked "Search Blog".
This is the best way to look for a file if you have specific information as to either its name or composer/arranger.
After a search, if you would like to return to the main page, just click on the main title of the blog, i.e. "arts ensemble library online".