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