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

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 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 practical astronomy series ))".
• Adding a wildcard symbol may retrieve word variants: (( the ((patrick moocs) OR (patrick moore)) practical astronomy series ) or ( the patrick moyes practical astronomy series ))*.