Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy studies » astronomy study, economy studies, astronomy status
patrick more » patrick moore, patrick moyes, patrick mark
patrick mkie » patrick mackie, patrick mein, patrick moore

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "the ((patrick more) OR (patrick mkie)) practical astronomy studies".
• Adding a wildcard symbol may retrieve word variants: the ((patrick more) OR (patrick mkie)) practical astronomy studies*.