Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
moore practical » more practical, moocs practical, mouse practical
moyes practical » modes practical, movies practical, moraes practical
mons positional » monkey positional, points positional, holds positional
mons practical » coins practical, bonds practical, boss practical
patrick moyes » patrick keyes, patrick mayen, patrick moore's
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 moore practical astronomy series ) OR ((( the patrick moyes practical astronomy series ) OR ((( the patrick mons practical astronomy series ) OR ( the patrick mons positional astronomy series )))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moore practical astronomy series ) or ((( the patrick moyes practical astronomy series ) or ((( the patrick mons practical astronomy series ) OR ( the patrick mons positional astronomy series ))))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore practical astronomy series ) or ((( the patrick moyes practical astronomy series ) or ((( the patrick mons practical astronomy series ) OR ( the patrick mons positional astronomy series ))))))*.