Talvez deva tentar algumas variações de ortografia:
prevent nerve » prevents nerve (Expandir a Pesquisa), prevent neural (Expandir a Pesquisa), prevent new (Expandir a Pesquisa)
benigno nerve » benign nerve (Expandir a Pesquisa), benigno leyva (Expandir a Pesquisa), benign nevi (Expandir a Pesquisa)
crespo nerve » crest nerve (Expandir a Pesquisa), crespo hervas (Expandir a Pesquisa), crespo servan (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
nerve cyst » nerve cat (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
i prevent » i prevents (Expandir a Pesquisa), ii prevent (Expandir a Pesquisa), a prevent (Expandir a Pesquisa)
_ benigno » _ benign (Expandir a Pesquisa), a benigno (Expandir a Pesquisa), c benigno (Expandir a Pesquisa)
_ crespo » a crespo (Expandir a Pesquisa), _ crest (Expandir a Pesquisa), _ cresol (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (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: (((( i prevent nerve cyst due ) or ( _ crespo nerve system dis ))) or ( _ benigno nerve case dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( i prevent nerve cyst due ) OR ( _ crespo nerve system dis ))) OR ( _ benigno nerve case dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i prevent nerve cyst due ) or ( _ crespo nerve system dis ))) or ( _ benigno nerve case dis ))*.