Talvez deva tentar algumas variações de ortografia:
j recurrent » _ recurrent (Expandir a Pesquisa), a recurrent (Expandir a Pesquisa), 2 recurrent (Expandir a Pesquisa)
survey case » surveys case (Expandir a Pesquisa), survey cass (Expandir a Pesquisa), survey base (Expandir a Pesquisa)
neural can » neural con (Expandir a Pesquisa), neural canal (Expandir a Pesquisa), neural cue (Expandir a Pesquisa)
bena nerve » beta nerve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), renal nerve (Expandir a Pesquisa)
case does » cases does (Expandir a Pesquisa), cause does (Expandir a Pesquisa), base does (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j bena » j beena (Expandir a Pesquisa), j bent (Expandir a Pesquisa), j benham (Expandir a Pesquisa)
a dos » a dog (Expandir a Pesquisa), e dos (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 recurrent neural can dis ) OR ( 1 current survey case does ))) OR ( j bena nerve a dos ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j recurrent neural can dis ) OR ( 1 current survey case does ))) OR ( j bena nerve a dos ))*.