Talvez deva tentar algumas variações de ortografia:
crespo nerve » crest nerve (Expandir a Pesquisa), crespo hervas (Expandir a Pesquisa), crespo servan (Expandir a Pesquisa)
threat never » threat levers (Expandir a Pesquisa), threat severe (Expandir a Pesquisa), threat level (Expandir a Pesquisa)
never system » lever system (Expandir a Pesquisa), server system (Expandir a Pesquisa), river system (Expandir a Pesquisa)
denham nerve » dental nerve (Expandir a Pesquisa), dental nerves (Expandir a Pesquisa), dentin nerve (Expandir a Pesquisa)
system due » system der (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j crespo » a crespo (Expandir a Pesquisa), d crespo (Expandir a Pesquisa), _ crespo (Expandir a Pesquisa)
j threat » a threat (Expandir a Pesquisa), 2 threat (Expandir a Pesquisa), 19 threat (Expandir a Pesquisa)
j denham » d denham (Expandir a Pesquisa), a denham (Expandir a Pesquisa), l denham (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (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: (((( j crespo nerve case due ) or ( j threat never system due ))) or ( j denham nerve can dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j crespo nerve case due ) OR ( j threat never system due ))) OR ( j denham nerve can dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j crespo nerve case due ) or ( j threat never system due ))) or ( j denham nerve can dis ))*.