Perhaps you should try some spelling variations:
detect central » direct central (Expand Search), detecting central (Expand Search), insect central (Expand Search)
benign nerve » benign nevi (Expand Search), benign neck (Expand Search), benign beale (Expand Search)
central cyst » central cystic (Expand Search), central chest (Expand Search), central caso (Expand Search)
cent nerve » bent nerve (Expand Search), recent nerve (Expand Search), crest nerve (Expand Search)
nerve cyst » nerve cystic (Expand Search), nerve case (Expand Search), nerve cat (Expand Search)
a benign » _ benign (Expand Search)
2 detect » 2 detects (Expand Search), e2 detect (Expand Search), _ detect (Expand Search)
a cent » a cena (Expand Search), a cenp (Expand Search), a center (Expand Search)
cyst d » cyst _ (Expand Search), cyst a (Expand Search), cyst 2 (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: (( a cent nerve cyst d ) OR ((( a benign nerve cyst d ) OR ( 2 detect central cyst d ))))~.
• Adding a wildcard symbol may retrieve word variants: (( a cent nerve cyst d ) or ((( a benign nerve cyst d ) or ( 2 detect central cyst d ))))*.