Talvez deva tentar algumas variações de ortografia:
research systems » research synthesis (Expandir a Pesquisa)
mena research » meta research (Expandir a Pesquisa), men research (Expandir a Pesquisa), mental research (Expandir a Pesquisa)
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
systems dis » systems disk (Expandir a Pesquisa), systems tdis (Expandir a Pesquisa), systems dss (Expandir a Pesquisa)
cena nerve » renal nerve (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), cornea nerve (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
nerve can » merve can (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve cn (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can dags (Expandir a Pesquisa)
nerve e » nerve ex (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
i cena » a cena (Expandir a Pesquisa), _ cena (Expandir a Pesquisa), e cena (Expandir a Pesquisa)
j mena » j meng (Expandir a Pesquisa), j medina (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 central nerve can dcs ) or ( i cena nerve e dos ))) or ( j mena research systems dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j central nerve can dcs ) OR ( i cena nerve e dos ))) OR ( j mena research systems dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j central nerve can dcs ) or ( i cena nerve e dos ))) or ( j mena research systems dis ))*.