Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy survey » astronomy surveys, autonomy survey, astronomy surveying
moraes practical » more practical, movies practical, modes practical
astronomy sergey » astronomy surveys, astronomy large, astronomy society
moocs practical » mics practical, abcs practical, ics practical
astronomy seven » astronomy some, astronomy science, astronomy between
moyes practical » modes practical, movies practical, notes practical
patrick moraes » patrick moore's, patrick moore, patrick morgan
moocs nautical » hoc nautical, logs 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 seven ) OR ((( the patrick moyes practical astronomy survey ) OR ( the patrick moraes practical astronomy survey ))))) OR ( the patrick moocs nautical astronomy sergey )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( the patrick moocs practical astronomy seven ) or ((( the patrick moyes practical astronomy survey ) OR ( the patrick moraes practical astronomy survey ))))) or ( the patrick moocs nautical astronomy sergey ))".
• Adding a wildcard symbol may retrieve word variants: (((( the patrick moocs practical astronomy seven ) or ((( the patrick moyes practical astronomy survey ) OR ( the patrick moraes practical astronomy survey ))))) or ( the patrick moocs nautical astronomy sergey ))*.