Talvez deva tentar algumas variações de ortografia:
current case » current care (Expandir a Pesquisa), recurrent case (Expandir a Pesquisa), current can (Expandir a Pesquisa)
cast direct » fast direct (Expandir a Pesquisa), caso direct (Expandir a Pesquisa), cost direct (Expandir a Pesquisa)
case system » caste system (Expandir a Pesquisa), base system (Expandir a Pesquisa), phase system (Expandir a Pesquisa)
sena nerve » sena herve (Expandir a Pesquisa), renal nerve (Expandir a Pesquisa), senal merve (Expandir a Pesquisa)
nerve cast » nerve cat (Expandir a Pesquisa), nerve cyst (Expandir a Pesquisa), nerve mast (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
i sena » i senna (Expandir a Pesquisa), i send (Expandir a Pesquisa), i sens (Expandir a Pesquisa)
j beta » j beth (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": "(((( i sena nerve cast direct ) OR ( i current case system dis ))) OR ( j beta nerve case dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i sena nerve cast direct ) OR ( i current case system dis ))) OR ( j beta nerve case dis ))*.