Talvez deva tentar algumas variações de ortografia:
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
letter nerve » letter nurse (Expandir a Pesquisa), matter nerve (Expandir a Pesquisa), letter nervous (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
system due » system der (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
a letter » _ letter (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j beta » j beth (Expandir a Pesquisa)
a due » _ due (Expandir a Pesquisa), a dye (Expandir a Pesquisa), i due (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: (( a letter nerve system due ) or ((( j central nerve system dis ) or ( j beta nerve a due ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a letter nerve system due ) OR ((( j central nerve system dis ) OR ( j beta nerve a due )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a letter nerve system due ) or ((( j central nerve system dis ) or ( j beta nerve a due ))))*.