Perhaps you should try some spelling variations:
astronomy series » astronomy sergey, gastronomy services, astronomy survives
astronomy survey » astronomy surveys, astronomy sergey, autonomy survey
patrick more » patrick moore, patrick moyes, patrick mkie

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