Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
patrick moyes » patrick keyes, patrick mons, patrick moore's
patrick mayen » patrick bayer, patrick madan, patrick maxton

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 moyes) OR (patrick mayen)) practical astronomy surveys.
• Adding a wildcard symbol may retrieve word variants: the ((patrick moyes) or (patrick mayen)) practical astronomy surveys*.