Talvez deva tentar algumas variações de ortografia:
research systems » research synthesis (Expandir a Pesquisa)
meng research » being research (Expandir a Pesquisa), lung research (Expandir a Pesquisa), gung research (Expandir a Pesquisa)
center nerve » cancer nerve (Expandir a Pesquisa), center nurse (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
real nerve » renal nerve (Expandir a Pesquisa), rectal nerve (Expandir a Pesquisa), reveal nerve (Expandir a Pesquisa)
systems de » systems do (Expandir a Pesquisa), systems mems (Expandir a Pesquisa), systems data (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), j centeno (Expandir a Pesquisa), j cestero (Expandir a Pesquisa)
nerve _n » nerve can (Expandir a Pesquisa), nerve 2nd (Expandir a Pesquisa), nerve aen (Expandir a Pesquisa)
_n dis » en dis (Expandir a Pesquisa), nn dis (Expandir a Pesquisa)
i real » i read (Expandir a Pesquisa), i really (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 center nerve _n dis ) OR ( i real nerve _ diaz ))) OR ( j meng research systems de ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center nerve _n dis ) or ( i real nerve _ diaz ))) or ( j meng research systems de ))*.