Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
moocs practical » mics practical, abcs practical, ics practical
mons practical » coins practical, lens practical, owens practical
moocs nautical » hoc nautical, logs nautical, nos nautical
patrick moocs » patrick moore, patrick moyes, patrick moore's
patrick mons » patrick moyes, patrick bond, patrick mpondo

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