Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moocs practical » mics practical, does practical, drops practical
moyes practical » modes practical, movies practical, moraes practical
moyes nautical » logs nautical, mile nautical, nos nautical
patrick moocs » patrick moore, 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 practical astronomy surveys ) OR ((( the patrick moyes practical astronomy surveys ) OR ( the patrick moyes nautical astronomy surveys )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moocs practical astronomy surveys ) or ((( the patrick moyes practical astronomy surveys ) OR ( the patrick moyes nautical astronomy surveys ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moocs practical astronomy surveys ) or ((( the patrick moyes practical astronomy surveys ) OR ( the patrick moyes nautical astronomy surveys ))))*.