Talvez deva tentar algumas variações de ortografia:
centros nerve » controls nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), centres nerveux (Expandir a Pesquisa)
femoral nerve » femoral neck (Expandir a Pesquisa)
spinal nerve » retinal nerve (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
a centros » e centros (Expandir a Pesquisa), de centros (Expandir a Pesquisa), en centros (Expandir a Pesquisa)
j femoral » _ femoral (Expandir a Pesquisa), a femoral (Expandir a Pesquisa), 2 femoral (Expandir a Pesquisa)
nerve van » nerve vas (Expandir a Pesquisa), herve van (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j spinal » _ spinal (Expandir a Pesquisa), a spinal (Expandir a Pesquisa), 1 spinal (Expandir a Pesquisa)
van dis » van die (Expandir a Pesquisa), van diest (Expandir a Pesquisa), van dijk (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), can die (Expandir a Pesquisa), can dcs (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": "(((( a centros nerve cyst due ) OR ( j femoral nerve van dis ))) OR ( j spinal nerve can dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a centros nerve cyst due ) OR ( j femoral nerve van dis ))) OR ( j spinal nerve can dis ))*.