Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
patrick moocs » patrick moore's
patrick moyes » patrick keyes, patrick mayen, patrick moore's
patrick mons » patrick bond, patrick mpondo, patrick timony

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 series\") or (\"the ((patrick moyes) OR (patrick mons)) practical astronomy series\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"the ((patrick moocs) OR (patrick moore)) practical astronomy series\\") or (\\"the ((patrick moyes) or (patrick mons)) practical astronomy series\\"))\"".
• Removing quotes may allow a broader search: (( the ((patrick moocs) OR (patrick moore)) practical astronomy series ) or ( the ((patrick moyes) or (patrick mons)) practical astronomy series )).