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
moore optical » moire optical, more optical, core optical
patrick coyle » patrick doyle, patrick colm, patricia doyle
patrick boyle » patrick doyle, patrick boylan, patrick browne
patrick core » patrick corr, patrick corsi, patrick case

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 astronomy series ) OR ( the ((patrick coyle) OR (patrick boyle)) 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 astronomy series ) or ( the ((patrick coyle) OR (patrick boyle)) spherical astronomy series ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore optical astronomy series ) or ((( the patrick core spherical astronomy series ) or ( the ((patrick coyle) OR (patrick boyle)) spherical astronomy series ))))*.