Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
more practical » some practical
patrick moyes » patrick keyes, patrick mayen, patrick moore's
patrick more » patrick moore, patrick mkie, patrick mark
patrick mons » patrick bond, patrick mpondo, patrick timony

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 moyes) OR (patrick mons)) 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 moyes) OR (patrick mons)) positional astronomy sergey ))*".