Talvez deva tentar algumas variações de ortografia:
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
benign based » benign base (Expandir a Pesquisa), design based (Expandir a Pesquisa), benign case (Expandir a Pesquisa)
renal nerve » retinal nerve (Expandir a Pesquisa), cranial nerve (Expandir a Pesquisa), spinal nerve (Expandir a Pesquisa)
nerve van » nerve vas (Expandir a Pesquisa), herve van (Expandir a Pesquisa), nerve vi (Expandir a Pesquisa)
i mental » vi mental (Expandir a Pesquisa), ii mental (Expandir a Pesquisa), i metal (Expandir a Pesquisa)
j benign » j benigno (Expandir a Pesquisa), do benign (Expandir a Pesquisa), ml benign (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
van dis » van die (Expandir a Pesquisa), van diest (Expandir a Pesquisa), van dijk (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
a diets » a dietas (Expandir a Pesquisa), a diet's (Expandir a Pesquisa), a dinets (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( a renal nerve van dis ) OR ( i mental nerve a diets ))) OR ( j benign based case dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a renal nerve van dis ) OR ( i mental nerve a diets ))) OR ( j benign based case dis ))*.