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

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 survey)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick moore practical ((astronomy series) or (((((astronomy survives) OR (astronomy surveys))) or (astronomy survey))))".
• Adding a wildcard symbol may retrieve word variants: the patrick moore practical ((astronomy series) or (((((astronomy survives) OR (astronomy surveys))) or (astronomy survey))))*.