Talvez deva tentar algumas variações de ortografia:
crespo servan » crespo hervas (Expandir a Pesquisa), crespo sara (Expandir a Pesquisa), crespo sergio (Expandir a Pesquisa)
servan system » serving system (Expandir a Pesquisa), servo system (Expandir a Pesquisa), german system (Expandir a Pesquisa)
rodent nerve » rodent nerves (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), rodent nervous (Expandir a Pesquisa)
benign neck » benign nevi (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
i rodent » ii rodent (Expandir a Pesquisa), _ rodent (Expandir a Pesquisa), a rodent (Expandir a Pesquisa)
j crespo » a crespo (Expandir a Pesquisa), d crespo (Expandir a Pesquisa), _ crespo (Expandir a Pesquisa)
1 benign » _ benign (Expandir a Pesquisa), a benign (Expandir a Pesquisa), 2 benign (Expandir a Pesquisa)
neck cat » neck ct (Expandir a Pesquisa), neck can (Expandir a Pesquisa), neck cut (Expandir a Pesquisa)
cat diet » cat diets (Expandir a Pesquisa), fat diet (Expandir a Pesquisa), eat diet (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 rodent nerve cyst due ) or ( j crespo servan system dis ))) or ( 1 benign neck cat diet ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( i rodent nerve cyst due ) OR ( j crespo servan system dis ))) OR ( 1 benign neck cat diet )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i rodent nerve cyst due ) or ( j crespo servan system dis ))) or ( 1 benign neck cat diet ))*.