Perhaps you should try some spelling variations:
crespo derived » crest derived (Expand Search), cre derived (Expand Search), tempo derived (Expand Search)
femoral nerve » femoral neck (Expand Search)
benito nerve » benign nerve (Expand Search), benito narvaez (Expand Search), benito eva (Expand Search)
derived ear » derived egr (Expand Search), derived early (Expand Search), derived egfr (Expand Search)
i femoral » ii femoral (Expand Search), bi femoral (Expand Search), _ femoral (Expand Search)
j crespo » g crespo (Expand Search), a crespo (Expand Search), _ crespo (Expand Search)
ear diet » year diet (Expand Search), bear diet (Expand Search), bar diet (Expand Search)
nerve cn » nerve can (Expand Search), nerve c (Expand Search), nerve co (Expand Search)
j benito » j benitez (Expand Search)
nerve a » nerve _ (Expand Search)
cn dce » can dce (Expand Search), co dce (Expand Search), cg dce (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

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: (((( j crespo derived ear diet ) OR ( i femoral nerve cn dce ))) OR ( j benito nerve a d ))~.
• Adding a wildcard symbol may retrieve word variants: (((( j crespo derived ear diet ) or ( i femoral nerve cn dce ))) or ( j benito nerve a d ))*.