Perhaps you should try some spelling variations:
"Handbook of clinical neurology" » "Handbook of clinical pathology", "Handbook of clinical neurophysiology", "Handbook of clinical neuropsychology"
"handbook of clinical oncology" » "handbook of clinical psychology", "handbook of surgical oncology"

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: (((("Handbook of clinical neurology") OR ("Handbook of clinical immunology"))) OR ("handbook of clinical oncology")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Handbook of clinical neurology\") OR (\"Handbook of clinical immunology\"))) or (\"handbook of clinical oncology\"))".
• Removing quotes may allow a broader search: (((( Handbook of clinical neurology ) OR ( Handbook of clinical immunology ))) or ( handbook of clinical oncology )).
• Adding a wildcard symbol may retrieve word variants: (((("Handbook of clinical neurology") OR ("Handbook of clinical immunology"))) or ("handbook of clinical oncology"))*.