Talvez deva tentar algumas variações de ortografia:
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa)
system dias » system dan (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dcus (Expandir a Pesquisa)
absent pain » absent brain (Expandir a Pesquisa), absent paris (Expandir a Pesquisa), absent patient (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
i mental » vi mental (Expandir a Pesquisa), ii mental (Expandir a Pesquisa), i metal (Expandir a Pesquisa)
_ absent » _ absence (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
a dis » a dos (Expandir a Pesquisa), a des (Expandir a Pesquisa), a dia (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: (((( j central nerve system dias ) OR ( i mental nerve a dis ))) OR ( _ absent pain a dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j central nerve system dias ) or ( i mental nerve a dis ))) or ( _ absent pain a dis ))*.