Talvez deva tentar algumas variações de ortografia:
letter nerve » letter nurse (Expandir a Pesquisa), matter nerve (Expandir a Pesquisa), letter nervous (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
detect nerve » direct nerve (Expandir a Pesquisa), detect neural (Expandir a Pesquisa), detect novel (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
system de » system der (Expandir a Pesquisa), system delay (Expandir a Pesquisa)
a letter » _ letter (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
j detect » je detect (Expandir a Pesquisa), _ detect (Expandir a Pesquisa), 2 detect (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (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 letter nerve system de ) or ((( j bent nerve case dis ) or ( j detect nerve case dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a letter nerve system de ) OR ((( j bent nerve case dis ) OR ( j detect nerve case dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a letter nerve system de ) or ((( j bent nerve case dis ) or ( j detect nerve case dis ))))*.