Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy studies » astronomy study, economy studies, astronomy status
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moocs practical » mics practical, abcs practical, ics practical
patrick moocs » patrick moore, patrick mons, patrick moyes
patrick modes » patrick moyes, patrick mons, patrick moore's
trick modes » thick models, crick model, tric model

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