Perhaps you should try some spelling variations:
optical gastronomy » optics astronomy, nautical astronomy, local gastronomy
optical astronomy » nautical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
core spherical » case spherical, pole spherical, some spherical
moore optical » moire optical, more optical, core optical
patrick core » patrick corr, patrick corsi, patrick coyle

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