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