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 smoker, hadrons" » "nuclear physics, heavy smokers, hadrons", "nuclear physics, heavy snorers, hadrons", "nuclear physics, heavy smoking, hadrons"
"nuclear physics, heavy sons, hadrons" » "nuclear physics, heavy ions, hadrons"
"nuclear physics, heavy sour, hadrons" » "nuclear physics, heavy hour, hadrons", "nuclear physics, heavy hours, hadrons"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nuclear physics, heavy sons, hadrons") OR ("nuclear physics, heavy mesons, hadrons"))) OR ((("nuclear physics, heavy sour, hadrons") OR ("nuclear physics, heavy smoker, hadrons")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nuclear physics, heavy sons, hadrons\") or (\"nuclear physics, heavy mesons, hadrons\"))) or (((\"nuclear physics, heavy sour, hadrons\") OR (\"nuclear physics, heavy smoker, hadrons\"))))".
• Removing quotes may allow a broader search: (((( nuclear physics, heavy sons, hadrons ) or ( nuclear physics, heavy mesons, hadrons ))) or ((( nuclear physics, heavy sour, hadrons ) OR ( nuclear physics, heavy smoker, hadrons )))).
• Adding a wildcard symbol may retrieve word variants: (((("nuclear physics, heavy sons, hadrons") or ("nuclear physics, heavy mesons, hadrons"))) or ((("nuclear physics, heavy sour, hadrons") OR ("nuclear physics, heavy smoker, hadrons"))))*.