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

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