Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
more practical » some practical
patrick more » patrick moore, patrick moyes, patrick mkie
i nautical » ii nautical, _ nautical, a nautical
patrick i » patrick _, patrick a, patrick d

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