When Using Search For at "List Accounts", Take Parked Domains Into Account

As a web hosting provider, I would like the search functionality in "List Accounts" to take parked domains into account, making it easier for me to find which account has the domain in question.

For example, if "testing.com" is parked on "test.com", and I search for "testing.com", that it either shows "test.com" account as one of the matches (while also showing me which addon domain matches), or that it would somehow help me with a message somewhere that says something along the lines of "There is no match for testing.com account, but there is a testing.com parked on test.com."