Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moocs practical » books practical, mics practical, colts practical
mons practical » coins practical, boss practical, lens practical
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.

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