If you are searching for videos type in the Search Box the name of the composer or performer and the word video,
e.g Mozart video then select 'All words'
If you are looking for events include the word events with the name of the composer or performer,
e,g Beethoven event, Viv event, then select 'All words' and so on, for any combination you would like to try.
When you get the results of your search make sure you have the complete set by checking at the bottom right of the search page to see if there are any more results available. It will often say Next 10 or whatever.