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

You may be able to get more results by adjusting your search query.

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