Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
mouse practical » course practical, rouses practical, use practical
more practical » some practical
patrick mouse » patrick moore, patrick mons, patrick cousot
patrick more » patrick moore, patrick moyes, patrick mkie

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 sergey ) OR ( the patrick more practical astronomy sergey )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mouse practical astronomy sergey ) or ( the patrick more practical astronomy sergey ))*.