Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
moore practical » more practical, moocs practical, mouse practical
moore nautical » mile nautical, moore national, some nautical
board nautical » board practical, board national, board neutral
patrick board » patrick bond, patrick hubbard, patrick leonard

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