Talvez deva tentar algumas variações de ortografia:
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
heart nerve » heart nerves (Expandir a Pesquisa), heart reserve (Expandir a Pesquisa), heart survey (Expandir a Pesquisa)
best nerve » best serve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), best served (Expandir a Pesquisa)
system due » system der (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
nerve age » nerve agent (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve area (Expandir a Pesquisa)
age disc » aged disc (Expandir a Pesquisa), large disc (Expandir a Pesquisa), age discus (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat diet (Expandir a Pesquisa)
j heart » j heard (Expandir a Pesquisa), j hearn (Expandir a Pesquisa), j hegarty (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 retinal nerve cat dis ) or ((( j best nerve system due ) or ( j heart nerve age disc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a retinal nerve cat dis ) OR ((( j best nerve system due ) OR ( j heart nerve age disc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a retinal nerve cat dis ) or ((( j best nerve system due ) or ( j heart nerve age disc ))))*.