Add additional instrument variations to the search list

When selecting a specific track and looking at the the instruments listed in details, I'll often see variations of instruments that aren't included in the dropdown search bar. For example, strings staccato, processed horns, acoustic guitar drumming, etc. Being able to search for these specific variations of instruments would be very useful. Sites like Soundstripe have this feature - where instruments in the search bar have a dropdown menu that has the sub-instruments listed. When hovering over the instruments there looks to be a unique url "...songs?instrument=strings-staccato", but clicking on this link doesn't bring up a list of songs that share that specific instrument. This would be really nice to have as an alternative to updating the instrument drop down list.