Talvez deva tentar algumas variações de ortografia:
mengual research » mental research (Expandir a Pesquisa), lingual research (Expandir a Pesquisa), medical research (Expandir a Pesquisa)
research system » research systems (Expandir a Pesquisa)
candel nerve » channel nerve (Expandir a Pesquisa), canal nerve (Expandir a Pesquisa), cancer nerve (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
system des » system der (Expandir a Pesquisa), system de (Expandir a Pesquisa), system design (Expandir a Pesquisa)
nerve _an » nerve can (Expandir a Pesquisa), nerve a (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
j mengual » m mengual (Expandir a Pesquisa), e mengual (Expandir a Pesquisa), l mengual (Expandir a Pesquisa)
j candel » j canter (Expandir a Pesquisa), j calder (Expandir a Pesquisa), j cancer (Expandir a Pesquisa)
_an dis » van dis (Expandir a Pesquisa), dan dis (Expandir a Pesquisa), can disc (Expandir a Pesquisa)
i bent » i benth (Expandir a Pesquisa), i benet (Expandir a Pesquisa), i bento (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 candel nerve _an dis ) OR ( i bent nerve _ dis ))) OR ( j mengual research system des ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j candel nerve _an dis ) or ( i bent nerve _ dis ))) or ( j mengual research system des ))*.