Talvez deva tentar algumas variações de ortografia:
research system » research systems (Expandir a Pesquisa)
media research » medical research (Expandir a Pesquisa), medicine research (Expandir a Pesquisa), dementia research (Expandir a Pesquisa)
center nerve » cancer nerve (Expandir a Pesquisa), center nurse (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), renal nerve (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
ii mental » ii metal (Expandir a Pesquisa), vi mental (Expandir a Pesquisa), mini mental (Expandir a Pesquisa)
system di » system de (Expandir a Pesquisa), system d (Expandir a Pesquisa), system dias (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), j centeno (Expandir a Pesquisa), j cestero (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
k media » k medias (Expandir a Pesquisa), uk media (Expandir a Pesquisa), k medina (Expandir a Pesquisa)
c dis » c dias (Expandir a Pesquisa), c disc (Expandir a Pesquisa), c dos (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 nerve can dis ) or ( ii mental nerve c dis ))) or ( k media research system di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j center nerve can dis ) OR ( ii mental nerve c dis ))) OR ( k media research system di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center nerve can dis ) or ( ii mental nerve c dis ))) or ( k media research system di ))*.