Perhaps you should try some spelling variations:
practical 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
moore practical » more practical, moocs practical, mouse practical
moore nautical » board nautical, mile nautical, moore national

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 survey ) OR ( the patrick moore nautical astronomy surveys )))).
• 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 survey ) OR ( the patrick moore nautical astronomy surveys ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore practical astronomy survives ) or ((( the patrick moore nautical astronomy survey ) OR ( the patrick moore nautical astronomy surveys ))))*.