Perhaps you should try some spelling variations:
letter nerve » letter nurse (Expand Search), matter nerve (Expand Search), letter nervous (Expand Search)
dental nerve » mental nerve (Expand Search), ventral nerve (Expand Search), central nerve (Expand Search)
renal nerve » retinal nerve (Expand Search), cranial nerve (Expand Search), spinal nerve (Expand Search)
nerve cat » nerve can (Expand Search), nerve ct (Expand Search), nerve cut (Expand Search)
j letter » bj letter (Expand Search), cj letter (Expand Search), j letters (Expand Search)
nerve nn » nerve non (Expand Search), nerve na (Expand Search), nerve net (Expand Search)
case dis » case disc (Expand Search), case did (Expand Search), case di (Expand Search)
j dental » j dent (Expand Search), j delta (Expand Search), j deal (Expand Search)
i renal » ii renal (Expand Search), i real (Expand Search)
cat dis » cat did (Expand Search), cat diets (Expand Search), cat bias (Expand Search)
nn dis » en dis (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j letter nerve nn dis ) or ( i renal nerve case dis ))) or ( j dental nerve cat dis ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( j letter nerve nn dis ) OR ( i renal nerve case dis ))) OR ( j dental nerve cat dis )).
• Adding a wildcard symbol may retrieve word variants: (((( j letter nerve nn dis ) or ( i renal nerve case dis ))) or ( j dental nerve cat dis ))*.