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