Talvez deva tentar algumas variações de ortografia:
research systems » research synthesis (Expandir a Pesquisa)
medina research » media research (Expandir a Pesquisa), medica research (Expandir a Pesquisa), medical research (Expandir a Pesquisa)
systems disk » systems risk (Expandir a Pesquisa), systems dss (Expandir a Pesquisa), systems das (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j medina » j mejia (Expandir a Pesquisa)
cat dis » cat diets (Expandir a Pesquisa), cat diet (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (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: (((( a bent nerve cat dis ) or ( i beta nerve c dis ))) or ( j medina research systems disk ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a bent nerve cat dis ) OR ( i beta nerve c dis ))) OR ( j medina research systems disk )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a bent nerve cat dis ) or ( i beta nerve c dis ))) or ( j medina research systems disk ))*.