Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
devices practical » services practical, devices electrical, services practices
moraes practical » more practical, modes practical, moral practical
movies practical » modules practical, reviews practical, notes practical
moocs practical » books practical, mics practical, colts 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 surveys ) OR ((( the patrick moraes practical astronomy surveys ) OR ( the patrick ((movies practical) OR (devices practical)) astronomy surveys )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moocs practical astronomy surveys ) or ((( the patrick moraes practical astronomy surveys ) or ( the patrick ((movies practical) OR (devices practical)) astronomy surveys ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moocs practical astronomy surveys ) or ((( the patrick moraes practical astronomy surveys ) or ( the patrick ((movies practical) OR (devices practical)) astronomy surveys ))))*.