Perhaps you should try some spelling variations:
astronomy surveying » astronomy during
astronomy survives » astronomy survey, astronomy surveys
astronomy studies » astronomy study, economy studies, astronomy status
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
moocs practical » books practical, mics practical, colts practical
patrick moocs » patrick moore, patrick mons, patrick moore's
patrick moyes » patrick keyes, patrick mayen, patrick mons
moyes optical » modes optical, dyes optical, boxes optical

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