Talvez deva tentar algumas variações de ortografia:
current during » current drug (Expandir a Pesquisa)
during system » during systems (Expandir a Pesquisa), curing system (Expandir a Pesquisa), during systemic (Expandir a Pesquisa)
bent nervous » get nervous (Expandir a Pesquisa), cental nervous (Expandir a Pesquisa), latent nervous (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system das (Expandir a Pesquisa), system dcs (Expandir a Pesquisa)
system di » system de (Expandir a Pesquisa), system d (Expandir a Pesquisa), system dias (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa), j center (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j cent nerve case dis ) or ( 1 current during system dis ))) or ( j bent nervous system di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j cent nerve case dis ) OR ( 1 current during system dis ))) OR ( j bent nervous system di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cent nerve case dis ) or ( 1 current during system dis ))) or ( j bent nervous system di ))*.