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 » books practical, mics practical, colts practical
modes practical » models practical, model practical, codes practical
patrick moocs » patrick moore, patrick mons, patrick moyes
patrick modes » patrick moyes, patrick mons, trick modes

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 practical astronomy surveys )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moocs practical astronomy studies ) or ( the patrick modes practical astronomy surveys ))*.