Perhaps you should try some spelling variations:
detect nerve » direct nerve (Expand Search), detect neural (Expand Search), detect novel (Expand Search)
entner nerve » enteric nerve (Expand Search), after nerve (Expand Search), other nerve (Expand Search)
benito leyva » benigno leyva (Expand Search), benitez leyva (Expand Search), benito leon (Expand Search)
leyva base » leyva jose (Expand Search), leyva baca (Expand Search), leyva bailen (Expand Search)
j entner » j centner (Expand Search), _ entner (Expand Search), _ gentner (Expand Search)
j detect » j detects (Expand Search), _ detect (Expand Search), 2 detect (Expand Search)
a benito » a benitez (Expand Search), a benites (Expand Search), a benign (Expand Search)
nerve c » nerve cn (Expand Search), nerve co (Expand Search), nerve ct (Expand Search)
case di » case did (Expand Search), case dti (Expand Search), case de (Expand Search)
base di » base de (Expand Search), base do (Expand Search), base da (Expand Search)
c dis » c dias (Expand Search), c disc (Expand Search), c dos (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 entner nerve c dis ) OR ((( j detect nerve case di ) OR ( a benito leyva base di ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j entner nerve c dis ) or ((( j detect nerve case di ) or ( a benito leyva base di ))))*.