Perhaps you should try some spelling variations:
astronomy survives » astronomy survey, astronomy studies
astronomy surveys » astronomy survey, astronomy surveying, astronomy sergey
astronomy series » astronomy sergey, gastronomy services, astronomy studies
moore practical » more practical, moocs practical, mouse practical
astronomy large » astronomy sergey, astronomy line, astronomy long

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 practical ((((astronomy series) OR (((astronomy survives) OR (astronomy surveys))))) OR (astronomy large)).
• Adding a wildcard symbol may retrieve word variants: the patrick moore practical ((((astronomy series) or (((astronomy survives) or (astronomy surveys))))) or (astronomy large))*.