Perhaps you should try some spelling variations:
practical astronomy » optical astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
moore positional » aware positional, pure positional, whole positional
more practical » some practical
more nautical » some nautical, board nautical, more natural
mile nautical » i nautical, ii nautical, some nautical
patrick more » patrick moyes, patrick mkie, patrick mark
patrick mile » patrick miller, patrick riley, patrick maill

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 more nautical astronomy sergey ) OR ( the patrick mile nautical astronomy sergey ))))) OR ( the patrick moore positional astronomy sergey )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( the patrick more practical astronomy sergey ) or ((( the patrick more nautical astronomy sergey ) OR ( the patrick mile nautical astronomy sergey ))))) or ( the patrick moore positional astronomy sergey ))".
• Adding a wildcard symbol may retrieve word variants: (((( the patrick more practical astronomy sergey ) or ((( the patrick more nautical astronomy sergey ) OR ( the patrick mile nautical astronomy sergey ))))) or ( the patrick moore positional astronomy sergey ))*.