Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy surveys
astronomy studies » astronomy study, economy studies, astronomy status
moore practical » moocs practical, course practical, before practical
mouse practical » course practical, rouses practical, use practical
more practical » some practical
patrick mouse » patrick mons, patrick cousot, patrick mkie
patrick more » patrick moyes, patrick mkie, patrick mark

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 moore practical astronomy survives ) OR ( the patrick mouse practical astronomy survives ))) OR ((( the patrick more practical astronomy survives ) OR ( the patrick more practical astronomy studies )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( the patrick moore practical astronomy survives ) OR ( the patrick mouse practical astronomy survives ))) or ((( the patrick more practical astronomy survives ) or ( the patrick more practical astronomy studies ))))".
• Adding a wildcard symbol may retrieve word variants: (((( the patrick moore practical astronomy survives ) OR ( the patrick mouse practical astronomy survives ))) or ((( the patrick more practical astronomy survives ) or ( the patrick more practical astronomy studies ))))*.