Talvez deva tentar algumas variações de ortografia:
center nervous » cental nervous (Expandir a Pesquisa), letter nervous (Expandir a Pesquisa), central nervous (Expandir a Pesquisa)
nervous syste » nervous system (Expandir a Pesquisa), nervous systems (Expandir a Pesquisa), nervous system's (Expandir a Pesquisa)
central merve » central nerve (Expandir a Pesquisa), central nerven (Expandir a Pesquisa), central nerves (Expandir a Pesquisa)
cancer could » cancer should (Expandir a Pesquisa)
could based » should based (Expandir a Pesquisa), could ease (Expandir a Pesquisa), could basic (Expandir a Pesquisa)
syste due » system due (Expandir a Pesquisa), systems due (Expandir a Pesquisa), system duke (Expandir a Pesquisa)
based due » biased due (Expandir a Pesquisa), based de (Expandir a Pesquisa), base due (Expandir a Pesquisa)
i central » coli central (Expandir a Pesquisa), hemi central (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), j centeno (Expandir a Pesquisa), j cestero (Expandir a Pesquisa)
j cancer » j canter (Expandir a Pesquisa), j cantero (Expandir a Pesquisa), j candel (Expandir a Pesquisa)
can due » scan due (Expandir a Pesquisa), man due (Expandir a Pesquisa), can de (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: (((( j center nervous syste due ) or ( j cancer could based due ))) or ( i central merve can due ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j center nervous syste due ) OR ( j cancer could based due ))) OR ( i central merve can due )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center nervous syste due ) or ( j cancer could based due ))) or ( i central merve can due ))*.