Talvez deva tentar algumas variações de ortografia:
research system » research systems (Expandir a Pesquisa)
meng research » among research (Expandir a Pesquisa), being research (Expandir a Pesquisa), lung research (Expandir a Pesquisa)
centner nerve » central nerve (Expandir a Pesquisa), cancer nerve (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
renal nerve » retinal nerve (Expandir a Pesquisa), cranial nerve (Expandir a Pesquisa), spinal nerve (Expandir a Pesquisa)
j centner » j center (Expandir a Pesquisa), m centner (Expandir a Pesquisa), _ entner (Expandir a Pesquisa)
nerve _at » nerve cat (Expandir a Pesquisa), nerve a (Expandir a Pesquisa), nerve can (Expandir a Pesquisa)
system de » system der (Expandir a Pesquisa), system delay (Expandir a Pesquisa)
_at dis » rat disc (Expandir a Pesquisa)
i renal » i real (Expandir a Pesquisa)
j meng » j mena (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j centner nerve _at dis ) OR ( i renal nerve _ dias ))) OR ( j meng research system de ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j centner nerve _at dis ) or ( i renal nerve _ dias ))) or ( j meng research system de ))*.