Talvez deva tentar algumas variações de ortografia:
neuronal systems » neural systems (Expandir a Pesquisa), neuron system (Expandir a Pesquisa), neural system (Expandir a Pesquisa)
central neuronal » central neurons (Expandir a Pesquisa), central neural (Expandir a Pesquisa), central neurones (Expandir a Pesquisa)
recurrent nerve » recurrent neural (Expandir a Pesquisa)
j recurrent » _ recurrent (Expandir a Pesquisa), a recurrent (Expandir a Pesquisa), 1 recurrent (Expandir a Pesquisa)
systems dis » systems disk (Expandir a Pesquisa), systems tdis (Expandir a Pesquisa), systems dss (Expandir a Pesquisa)
nerve cyst » nerve cystic (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
cyst e » cyst _ (Expandir a Pesquisa), cyst a (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 nerve cyst e ) OR ( j central neuronal systems dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j recurrent nerve cyst e ) OR ( j central neuronal systems dis ))*.