Perhaps you should try some spelling variations:
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"the patrick moocs practical astronomy survey" » "the patrick moocs nautical astronomy survey", "the patrick moocs optical astronomy survey", "the patrick moocs positional astronomy survey", "the patrick moocs practical astronomy surveys", "the patrick moocs practical astronomy sergey", "the patrick moocs practical autonomy survey", "the patrick mics practical astronomy survey", "the patrick does practical astronomy survey", "the patrick drops practical astronomy survey", "the patrick mons practical astronomy survey", "the patrick moyes practical astronomy survey", "the patrick moore's practical astronomy survey"
"the patrick moore practical astronomy studies" » "the patrick moore nautical astronomy studies", "the patrick moore optical astronomy studies", "the patrick moore positional 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 mouse practical astronomy studies", "the patrick course practical astronomy studies"

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