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

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