Perhaps you should try some spelling variations:
"biological and medical biophysics biomedical engineering" » "biological and medical optics biomedical engineering", "biological and medical biophysicsm biomedical engineering", "biological and medical physics biomedical engineering", "biological and medical metaphysics biomedical engineering"
"biological and optical biophysics biomedical engineering" » "biological and optical optics biomedical engineering", "biological and optical physics biomedical engineering", "biological and optical biopsies biomedical engineering"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"biological and medical biophysics biomedical engineering\") OR (\"biological and optical biophysics biomedical engineering\"))".
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• Adding a wildcard symbol may retrieve word variants: (("biological and medical biophysics biomedical engineering") OR ("biological and optical biophysics biomedical engineering"))*.