Talvez deva tentar algumas variações de ortografia:
recurrent nerve » recurrent neural (Expandir a Pesquisa)
current curve » current survey (Expandir a Pesquisa), current care (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
19 recurrent » 1 recurrent (Expandir a Pesquisa), 11 recurrent (Expandir a Pesquisa), 13 recurrent (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
curve cyst » curve cost (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat diet (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( 19 recurrent nerve cyst dis ) or ( 1 current curve cyst dis ))) or ( j beta nerve cat dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 19 recurrent nerve cyst dis ) OR ( 1 current curve cyst dis ))) OR ( j beta nerve cat dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 19 recurrent nerve cyst dis ) or ( 1 current curve cyst dis ))) or ( j beta nerve cat dis ))*.