Talvez deva tentar algumas variações de ortografia:
central neuron » central neurons (Expandir a Pesquisa), central neurones (Expandir a Pesquisa), central neuronal (Expandir a Pesquisa)
neuron system » neural systems (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)
cent have » ent have (Expandir a Pesquisa), cement have (Expandir a Pesquisa), center have (Expandir a Pesquisa)
have what » care what (Expandir a Pesquisa), age what (Expandir a Pesquisa)
bent have » beet have (Expandir a Pesquisa), ent have (Expandir a Pesquisa), agent have (Expandir a Pesquisa)
what did » what do (Expandir a Pesquisa)
i cent » i cento (Expandir a Pesquisa), ai cent (Expandir a Pesquisa), ii cent (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (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 ( i cent have what did ))) or ( j bent have what did ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j central neuron system das ) OR ( i cent have what did ))) OR ( j bent have what did )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j central neuron system das ) or ( i cent have what did ))) or ( j bent have what did ))*.