Perhaps you should try some spelling variations:
"nuclear physics, heavy mesons, hadrons" » "nuclear physics, heavy metals, hadrons", "nuclear physics, heavy ions, hadrons"
"nuclear physics, heavy sons, hadrons" » "nuclear physics, heavy ions, hadrons", "nuclear physics, heavy sour, hadrons"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nuclear physics, heavy sons, hadrons\") OR (\"nuclear physics, heavy mesons, hadrons\"))".
• Removing quotes may allow a broader search: (( nuclear physics, heavy sons, hadrons ) OR ( nuclear physics, heavy mesons, hadrons )).
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