Perhaps you should try some spelling variations:
"radio science series c:, mathematical and physical sciences" » "radio science series c:, mathematical and medical sciences", "radio science services c:, mathematical and physical sciences", "radio science theories c:, mathematical and physical sciences", "radio sciences serious c:, mathematical and physical sciences"
"radio science stories _:, mathematical and physical sciences" » "radio science stories _:, mathematical and medical sciences", "radio science studies _:, mathematical and physical sciences", "radio science theories _:, mathematical and physical sciences"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("radio science series c:, mathematical and physical sciences") OR ("radio science stories _:, mathematical and physical sciences")).
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