Talvez deva tentar algumas variações de ortografia:
recurrent nerve » recurrent neural (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
1 recurrent » _ recurrent (Expandir a Pesquisa), a recurrent (Expandir a Pesquisa)
bento nerve » bent nerve (Expandir a Pesquisa), benign nerve (Expandir a Pesquisa)
benth nerve » bent nerve (Expandir a Pesquisa), both nerve (Expandir a Pesquisa), seventh nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
j bento » j benito (Expandir a Pesquisa), j benton (Expandir a Pesquisa), j benson (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
l benth » l benato (Expandir a Pesquisa), ex benth (Expandir a Pesquisa)
die » diet (Expandir a Pesquisa), died (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": "(( 1 recurrent nerve system dis ) OR ((( j bento nerve a dias ) OR ( l benth nerve an die ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 1 recurrent nerve system dis ) OR ((( j bento nerve a dias ) OR ( l benth nerve an die ))))*.