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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nuclear physics, heavy sons, hadrons\") OR (\"nuclear physics, heavy sour, hadrons\"))".
• Removing quotes may allow a broader search: (( nuclear physics, heavy sons, hadrons ) OR ( nuclear physics, heavy sour, hadrons )).
• Adding a wildcard symbol may retrieve word variants: (("nuclear physics, heavy sons, hadrons") OR ("nuclear physics, heavy sour, hadrons"))*.