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