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
moyes nautical » logs nautical, mile nautical, nos nautical
more nautical » mile nautical, some nautical, board nautical
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick more » patrick mkie, patrick mark, patrick marx

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 moyes 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 moyes 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 moyes nautical astronomy sergey ))))) or ( the patrick moore positional astronomy sergey ))*.