Perhaps you should try some spelling variations:
moore positional » aware positional, pure positional, whole positional
astronomy series » astronomy sergey, gastronomy services, astronomy survives
core spherical » case spherical, pole spherical, some spherical
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 positional astronomy series ) OR ( the patrick core spherical astronomy series )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore positional astronomy series ) or ( the patrick core spherical astronomy series ))*.