Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick more » patrick moore, patrick mkie, patrick mark

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 more) OR (patrick moyes)) optical astronomy series.
• Adding a wildcard symbol may retrieve word variants: the ((patrick more) or (patrick moyes)) optical astronomy series*.