Perhaps you should try some spelling variations:
letter nervous » center nervous (Expand Search), lobster nervous (Expand Search), other nervous (Expand Search)
dental nerve » mental nerve (Expand Search), ventral nerve (Expand Search), central nerve (Expand Search)
nerve cause » nerve caused (Expand Search), nerves cause (Expand Search), nerve case (Expand Search)
benign nei » benign nevi (Expand Search), benign new (Expand Search), benign neck (Expand Search)
nervous a » nervous _ (Expand Search), nervous 5 (Expand Search)
j dental » j dent (Expand Search), j delta (Expand Search), j deal (Expand Search)
cause di » cause de (Expand Search), cause d (Expand Search), cause du (Expand Search)
j benign » j benigno (Expand Search), _ benign (Expand Search), a benign (Expand Search)
nei case » gei case (Expand Search), hei case (Expand Search), nei gas (Expand Search)
case dti » case data (Expand Search), based dti (Expand Search), case due (Expand Search)
a dis » a dos (Expand Search), a des (Expand Search), a dia (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.

• Removing quotes may allow a broader search: (( _ letter nervous a dis ) or ((( j dental nerve cause di ) or ( j benign nei case dti ))))~.