Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
core spherical » case spherical, cfrp spherical, coma spherical
pole spherical » some spherical, double spherical, plane spherical
moore optical » moire optical, more optical, core optical
patrick coyle » patrick boyle, patrick doyle, patricia doyle
patrick colm » patrick corr, patrick count, patrick cozzi

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 optical astronomy series ) OR ((( the patrick ((core spherical) OR (pole spherical)) astronomy series ) OR ( the ((patrick coyle) OR (patrick colm)) spherical astronomy series )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moore optical astronomy series ) or ((( the patrick ((core spherical) or (pole spherical)) astronomy series ) or ( the ((patrick coyle) OR (patrick colm)) spherical astronomy series ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore optical astronomy series ) or ((( the patrick ((core spherical) or (pole spherical)) astronomy series ) or ( the ((patrick coyle) OR (patrick colm)) spherical astronomy series ))))*.