Talvez deva tentar algumas variações de ortografia:
central neuron » central neurons (Expandir a Pesquisa), central neurones (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
neuron system » neural systems (Expandir a Pesquisa)
centri nerve » central nerve (Expandir a Pesquisa), centre nere (Expandir a Pesquisa), centri nervosi (Expandir a Pesquisa)
absent nerve » bent nerve (Expandir a Pesquisa), abducent nerve (Expandir a Pesquisa), augment nerve (Expandir a Pesquisa)
system das » system dias (Expandir a Pesquisa), systems das (Expandir a Pesquisa), system des (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
ai centri » dai centri (Expandir a Pesquisa), i centri (Expandir a Pesquisa), dei centri (Expandir a Pesquisa)
j absent » _ absent (Expandir a Pesquisa), l absent (Expandir a Pesquisa), 17 absent (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
a did » a didi (Expandir a Pesquisa), a dia (Expandir a Pesquisa), _ did (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j central neuron system das ) or ( ai centri nerve a did ))) or ( j absent nerve a did ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j central neuron system das ) OR ( ai centri nerve a did ))) OR ( j absent nerve a did )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j central neuron system das ) or ( ai centri nerve a did ))) or ( j absent nerve a did ))*.