Talvez deva tentar algumas variações de ortografia:
survey system » surgery system (Expandir a Pesquisa), prey system (Expandir a Pesquisa), grey system (Expandir a Pesquisa)
nerve based » nerves based (Expandir a Pesquisa), nerve caused (Expandir a Pesquisa), nerve case (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
nerve fact » nerve fat (Expandir a Pesquisa), nerve factor (Expandir a Pesquisa), nerve fatty (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
enda nerve » end nerve (Expandir a Pesquisa), tendon nerve (Expandir a Pesquisa), ending nerve (Expandir a Pesquisa)
fact diet » fat diet (Expandir a Pesquisa), fast diet (Expandir a Pesquisa), salt diet (Expandir a Pesquisa)
based dti » based data (Expandir a Pesquisa), based de (Expandir a Pesquisa), based d (Expandir a Pesquisa)
ii cent » ii center (Expandir a Pesquisa), ii centre (Expandir a Pesquisa), ii centro (Expandir a Pesquisa)
j enda » _ enda (Expandir a Pesquisa), r enda (Expandir a Pesquisa), o enda (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": "(((( ii cent nerve fact diet ) OR ( i current survey system dis ))) OR ( j enda nerve based dti ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( ii cent nerve fact diet ) OR ( i current survey system dis ))) OR ( j enda nerve based dti ))*.