Talvez deva tentar algumas variações de ortografia:
center nerve » cancer nerve (Expandir a Pesquisa), center nurse (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
benign nerve » benign nevi (Expandir a Pesquisa), benign neck (Expandir a Pesquisa), benign beale (Expandir a Pesquisa)
nerve cnase » nerve case (Expandir a Pesquisa), nerve cases (Expandir a Pesquisa), nerve encased (Expandir a Pesquisa)
nerve cause » nerve caused (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve course (Expandir a Pesquisa)
beth nerve » beta nerve (Expandir a Pesquisa), both nerve (Expandir a Pesquisa), both nerves (Expandir a Pesquisa)
cnase dti » case dti (Expandir a Pesquisa), class dti (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), 2 center (Expandir a Pesquisa), 3 center (Expandir a Pesquisa)
nerve cn » nerve can (Expandir a Pesquisa), nerve c (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
cause de » cause _ (Expandir a Pesquisa), cause a (Expandir a Pesquisa)
cn disc » can disc (Expandir a Pesquisa), c disc (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j center nerve cn disc ) OR ((( j beth nerve cnase dti ) OR ( _ benign nerve cause de ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j center nerve cn disc ) OR ((( j beth nerve cnase dti ) OR ( _ benign nerve cause de ))))*.