Perhaps you should try some spelling variations:
"the patrick moore practical 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 moocs practical astronomy studies", "the patrick mouse practical astronomy studies"
"the patrick mile nautical astronomy survives" » "the patrick mile nautical astronomy surveys", "the patrick i nautical astronomy survives", "the patrick ii nautical astronomy survives", "the patrick some nautical astronomy survives", "the patrick riley nautical astronomy survives", "the patrick mkie nautical astronomy survives", "the patrick mikalef nautical astronomy survives"
"the patrick maill nautical astronomy survives" » "the patrick maill nautical astronomy surveys", "the patrick martial nautical astronomy survives", "the patrick neill nautical astronomy survives", "the patrick gill nautical astronomy survives", "the patrick baillie nautical astronomy survives"
"the patrick miller nautical astronomy survives" » "the patrick miller nautical astronomy surveys", "the patrick miller critical astronomy survives"
"the patrick miller nautical astronomy survey" » "the patrick miller nautical astronomy surveys", "the patrick miller nautical astronomy sergey", "the patrick miller nautical autonomy survey", "the patrick miller critical astronomy survey"

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