Talvez deva tentar algumas variações de ortografia:
spinal nerve » retinal nerve (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), reserve system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
benton nerve » tendon nerve (Expandir a Pesquisa), benign nerve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system di (Expandir a Pesquisa), system das (Expandir a Pesquisa)
i spinal » i spiral (Expandir a Pesquisa), iii spinal (Expandir a Pesquisa), i spindle (Expandir a Pesquisa)
nerve cn » nerve can (Expandir a Pesquisa), nerve c (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
j benton » j benito (Expandir a Pesquisa)
a cent » a cena (Expandir a Pesquisa), a cenp (Expandir a Pesquisa), a center (Expandir a Pesquisa)
cn dcs » can dcs (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a cent nerve system dis ) OR ( i spinal nerve cn dcs ))) OR ( j benton nerve system dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a cent nerve system dis ) or ( i spinal nerve cn dcs ))) or ( j benton nerve system dis ))*.