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
patrick moocs » patrick moore, patrick mons, patrick moyes
ics practical » mics practical, abcs practical, ethics practical
patrick ics » patrick c, patrick ca, patrick ch

You may be able to get more results by adjusting your search query.

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