Perhaps you should try some spelling variations:
astronomy series » gastronomy services, astronomy survives, astronomy studies
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
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 (astronomy sergey)) ) OR ( the patrick core spherical ((astronomy series) OR (astronomy sergey)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moore optical ((astronomy series) OR (astronomy sergey)) ) or ( the patrick core spherical ((astronomy series) OR (astronomy sergey)) ))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore optical ((astronomy series) OR (astronomy sergey)) ) or ( the patrick core spherical ((astronomy series) OR (astronomy sergey)) ))*.