Talvez deva tentar algumas variações de ortografia:
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
ventral merve » ventral nerve (Expandir a Pesquisa), ventral mesh (Expandir a Pesquisa), ventral eye (Expandir a Pesquisa)
benign sevgi » benign severe (Expandir a Pesquisa), benign siv (Expandir a Pesquisa), benign self (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa), nerve case (Expandir a Pesquisa)
a ventral » _ ventral (Expandir a Pesquisa), a ventura (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
cat diet » cat diets (Expandir a Pesquisa), fat diet (Expandir a Pesquisa), eat diet (Expandir a Pesquisa)
can tdcs » a tdcs (Expandir a Pesquisa)
j benign » j benigno (Expandir a Pesquisa), _ benign (Expandir a Pesquisa), a benign (Expandir a Pesquisa)
unal d » unal de (Expandir a Pesquisa), unal md (Expandir a Pesquisa), unal g (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": "(((( j central nerve cat diet ) OR ( a ventral merve can tdcs ))) OR ( j benign sevgi unal d ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j central nerve cat diet ) OR ( a ventral merve can tdcs ))) OR ( j benign sevgi unal d ))*.