Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moore positional » aware positional, pure positional, whole positional
astronomy sergey » astronomy survey, astronomy seven, astronomy large
more practical » some practical
patrick more » patrick moyes, patrick mkie, patrick mark

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