Talvez deva tentar algumas variações de ortografia:
crespo servan » crespo hervas (Expandir a Pesquisa), crespo sara (Expandir a Pesquisa), crespo sergio (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
crest merve » crest nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), crest marcel (Expandir a Pesquisa)
delta nerve » beta nerve (Expandir a Pesquisa), deltoid nerve (Expandir a Pesquisa), deltas served (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
system de » system der (Expandir a Pesquisa), system delay (Expandir a Pesquisa)
i crespo » g crespo (Expandir a Pesquisa), a crespo (Expandir a Pesquisa), _ crespo (Expandir a Pesquisa)
servan a » servant a (Expandir a Pesquisa), servan la (Expandir a Pesquisa), servan _ (Expandir a Pesquisa)
j crest » _ crest (Expandir a Pesquisa), a crest (Expandir a Pesquisa), 5 crest (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (Expandir a Pesquisa)
j delta » j della (Expandir a Pesquisa), j delton (Expandir a Pesquisa)
a dis » a dos (Expandir a Pesquisa), a des (Expandir a Pesquisa), a dia (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": "(((( j crest merve can dis ) OR ( i crespo servan a dis ))) OR ( j delta nerve system de ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j crest merve can dis ) OR ( i crespo servan a dis ))) OR ( j delta nerve system de ))*.