Perhaps you should try some spelling variations:
"mathematics applications in the physical sciences" » "mathematics implications in the physical sciences", "semantics applications in the physical sciences", "mathematics education in the physical sciences"
"informatics applications in the medical sciences" » "informatics applications in the social sciences"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mathematics applications in the physical sciences") OR ("informatics applications in the medical sciences"))) OR ("mathematical applications in the physical sciences")).
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• Adding a wildcard symbol may retrieve word variants: (((("mathematics applications in the physical sciences") or ("informatics applications in the medical sciences"))) or ("mathematical applications in the physical sciences"))*.