Talvez deva tentar algumas variações de ortografia:
spiral merve » spiral nerve (Expandir a Pesquisa), spiral curve (Expandir a Pesquisa), soral merve (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
agent nerve » augment nerve (Expandir a Pesquisa), absent nerve (Expandir a Pesquisa), agent naive (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dds (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
ii agent » ii agents (Expandir a Pesquisa), mri agent (Expandir a Pesquisa), ii age (Expandir a Pesquisa)
i spiral » ii spiral (Expandir a Pesquisa), _ spiral (Expandir a Pesquisa), a spiral (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can bddcs (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( ii agent nerve system dis ) OR ( i spiral merve can dcs ))) OR ( j bent nerve system dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( ii agent nerve system dis ) or ( i spiral merve can dcs ))) or ( j bent nerve system dis ))*.