Perhaps you should try some spelling variations:
"the patrick moore practical astronomy studies" » "the patrick moore optical astronomy studies", "the patrick moore practical astronomy study", "the patrick moore practical economy studies", "the patrick moore practical astronomy status", "the patrick more practical astronomy studies", "the patrick moocs practical astronomy studies", "the patrick mouse practical astronomy studies"
"the patrick moore positional astronomy survives" » "the patrick moore positional astronomy survey", "the patrick aware positional astronomy survives", "the patrick pure positional astronomy survives", "the patrick whole positional astronomy survives"
"the patrick moocs nautical astronomy survives" » "the patrick moocs nautical astronomy survey", "the patrick moocs practical astronomy survives", "the patrick hoc nautical astronomy survives", "the patrick logs nautical astronomy survives", "the patrick mons nautical astronomy survives", "the patrick moyes nautical astronomy survives", "the patrick moore's nautical astronomy survives"
"the patrick moocs nautical astronomy surveys" » "the patrick moocs nautical astronomy survey", "the patrick moocs nautical astronomy surveying", "the patrick moocs nautical astronomy sergey", "the patrick moocs practical astronomy surveys", "the patrick hoc nautical astronomy surveys", "the patrick logs nautical astronomy surveys", "the patrick mons nautical astronomy surveys", "the patrick moyes nautical astronomy surveys", "the patrick moore's nautical astronomy surveys"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("the patrick moore practical astronomy studies") OR ("the patrick moore positional astronomy survives"))) OR ((("the patrick moocs nautical astronomy survives") OR ("the patrick moocs nautical astronomy surveys")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"the patrick moore practical astronomy studies\") or (\"the patrick moore positional astronomy survives\"))) or (((\"the patrick moocs nautical astronomy survives\") OR (\"the patrick moocs nautical astronomy surveys\"))))".
• Removing quotes may allow a broader search: (((( the patrick moore practical astronomy studies ) or ( the patrick moore positional astronomy survives ))) or ((( the patrick moocs nautical astronomy survives ) OR ( the patrick moocs nautical astronomy surveys )))).
• Adding a wildcard symbol may retrieve word variants: (((("the patrick moore practical astronomy studies") or ("the patrick moore positional astronomy survives"))) or ((("the patrick moocs nautical astronomy survives") OR ("the patrick moocs nautical astronomy surveys"))))*.