Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
22the patrick » father patrick, late patrick, bate patrick
patrick more » patrick moore, patrick moyes, patrick mkie
more optical » moire optical, core optical, more optimal

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• Adding a wildcard symbol may retrieve word variants: %22the patrick more optical astronomy series%22*.