Talvez deva tentar algumas variações de ortografia:
current curve » current survey (Expandir a Pesquisa), current care (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
curve system » curve systems (Expandir a Pesquisa), nerve system (Expandir a Pesquisa), cave system (Expandir a Pesquisa)
absent nerve » bent nerve (Expandir a Pesquisa), abducent nerve (Expandir a Pesquisa), augment nerve (Expandir a Pesquisa)
treat nerve » rat nerve (Expandir a Pesquisa), direct nerve (Expandir a Pesquisa)
system dias » system dan (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dcus (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
nerve cn » nerve can (Expandir a Pesquisa), nerve c (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
_ absent » _ absence (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa)
cn diet » can diet (Expandir a Pesquisa), n diet (Expandir a Pesquisa), acne 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 treat nerve cn diet ) or ( a current curve system dias ))) or ( _ absent nerve cyst dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( i treat nerve cn diet ) OR ( a current curve system dias ))) OR ( _ absent nerve cyst dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i treat nerve cn diet ) or ( a current curve system dias ))) or ( _ absent nerve cyst dis ))*.