Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
cortical astronomy » optical astronomy, copernican astronomy, classical astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy studies
mouse practical » course practical, rouses practical, more practical
mouse cortical » mouse aortic, mouse corneal
mouse nautical » mouse natural, logs nautical, mile nautical
patrick mouse » patrick moore, patrick mons, patrick cousot

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