Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moyes practical » modes practical, movies practical, moraes practical
mics practical » ics practical, micro practical, moocs practical
patrick moocs » patrick mons, patrick moore's
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick mics » patrick mons, patrick michel, patrick maill

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( the ((patrick moocs) OR (patrick moore)) practical astronomy surveys ) OR ( the patrick mics practical astronomy surveys ))) OR ( the patrick moyes practical astronomy surveys )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( the ((patrick moocs) OR (patrick moore)) practical astronomy surveys ) or ( the patrick mics practical astronomy surveys ))) or ( the patrick moyes practical astronomy surveys ))".
• Adding a wildcard symbol may retrieve word variants: (((( the ((patrick moocs) OR (patrick moore)) practical astronomy surveys ) or ( the patrick mics practical astronomy surveys ))) or ( the patrick moyes practical astronomy surveys ))*.