Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy studies
astronomy surveys » astronomy survey, astronomy surveying, astronomy sergey
moocs practical » mics practical, abcs practical, ics practical
moyes practical » modes practical, movies practical, moraes practical
modes nautical » modes practical, modes optical, logs nautical
patrick moocs » patrick moore, patrick mons, patrick moore's
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick modes » patrick mons, trick modes, patrick moore's

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 survives ) OR ((( the patrick moyes practical astronomy surveys ) OR ( the patrick modes nautical astronomy surveys )))).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moocs practical astronomy survives ) or ((( the patrick moyes practical astronomy surveys ) or ( the patrick modes nautical astronomy surveys ))))*.