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 des » systems does (Expandir a Pesquisa), systems dels (Expandir a Pesquisa), systems de (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
nerve laat » nerve lat (Expandir a Pesquisa), nerve lead (Expandir a Pesquisa)
cena nerve » renal nerve (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
laat die » staat die (Expandir a Pesquisa), lauft die (Expandir a Pesquisa), let die (Expandir a Pesquisa)
j medina » j mejia (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
a cent » a cena (Expandir a Pesquisa), a cenp (Expandir a Pesquisa), a center (Expandir a Pesquisa)
i cena » a cena (Expandir a Pesquisa), _ cena (Expandir a Pesquisa), e cena (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( a cent nerve laat die ) or ( i cena nerve a dis ))) or ( j medina research systems des ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a cent nerve laat die ) OR ( i cena nerve a dis ))) OR ( j medina research systems des )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a cent nerve laat die ) or ( i cena nerve a dis ))) or ( j medina research systems des ))*.