Perhaps you should try some spelling variations:
astronomy survives » astronomy surveys, astronomy studies
astronomy series » gastronomy services, astronomy studies, astronomy surveys
astronomy sergey » astronomy surveys, astronomy seven, astronomy large
astronomy survey » astronomy surveys, 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 sergey))) OR (((astronomy survives) OR (astronomy survey)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick moore practical ((((astronomy series) OR (astronomy sergey))) or (((astronomy survives) or (astronomy survey))))".
• Adding a wildcard symbol may retrieve word variants: the patrick moore practical ((((astronomy series) OR (astronomy sergey))) or (((astronomy survives) or (astronomy survey))))*.