Searching for an individual song or short piece that is part of a larger item is generally much more effective as a keyword search than as a title search. A successful search can be constructed by choosing the most significant and/or uniques word in the title. Omit any diacriticial marks. Try this search for the aria, La donna e mobile" from Rigoletto by Guiseppe Verdi. The results can be verified by looking at the contents notes in the "long view" of an item.
