Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
moocs practical » books practical, mics practical, colts practical
moyes practical » modes practical, movies practical, moraes practical
mons practical » coins practical, boss practical, lens practical
patrick moocs » patrick moore, 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 practical astronomy series ) OR ( the patrick moyes practical astronomy series ))) OR ( the patrick mons practical astronomy series )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( the patrick moocs practical astronomy series ) OR ( the patrick moyes practical astronomy series ))) or ( the patrick mons practical astronomy series ))".
• Adding a wildcard symbol may retrieve word variants: (((( the patrick moocs practical astronomy series ) OR ( the patrick moyes practical astronomy series ))) or ( the patrick mons practical astronomy series ))*.