Search for phrases, words or parts of words: 'viol' finds all items containing 'viol' or 'violin'. Separate terms by commas: 'flute, violin' finds all items containing both 'flute' AND 'violin'. Accents are ignored. Trio-sonata matches trio sonata.
Type your query, then press Return (also called Enter). In the results, click the reference number to see the full item details. Don't be puzzled if your search term doesn't show up in the list of results; all fields are searched, but the search results only show title and composer/author, so if your search term occurs in say the Notes section you'll have to visit the page to find it. (Try searching for 'guide', for example.)