Talvez deva tentar algumas variações de ortografia:
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
absent merve » absent nerve (Expandir a Pesquisa), absent gene (Expandir a Pesquisa), absent men (Expandir a Pesquisa)
merve canan » nerve canal (Expandir a Pesquisa), merve yaman (Expandir a Pesquisa), merve kocaman (Expandir a Pesquisa)
cent merve » cin merve (Expandir a Pesquisa), cengiz merve (Expandir a Pesquisa), celenk merve (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
nerve van » nerve vas (Expandir a Pesquisa), herve van (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
canan dis » canan de (Expandir a Pesquisa), canan dag (Expandir a Pesquisa), canan sin (Expandir a Pesquisa)
j absent » _ absent (Expandir a Pesquisa), l absent (Expandir a Pesquisa), 17 absent (Expandir a Pesquisa)
ii cent » ii center (Expandir a Pesquisa), ii centre (Expandir a Pesquisa), ii centro (Expandir a Pesquisa)
can due » scan due (Expandir a Pesquisa), man due (Expandir a Pesquisa), can de (Expandir a Pesquisa)
van dis » van die (Expandir a Pesquisa), van diest (Expandir a Pesquisa), van dijk (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": "(((( ii cent merve can due ) OR ( j central nerve van dis ))) OR ( j absent merve canan dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( ii cent merve can due ) OR ( j central nerve van dis ))) OR ( j absent merve canan dis ))*.