Talvez deva tentar algumas variações de ortografia:
prevent nerve » prevents nerve (Expandir a Pesquisa), prevent neural (Expandir a Pesquisa), prevent anergy (Expandir a Pesquisa)
best observed » best served (Expandir a Pesquisa), event observed (Expandir a Pesquisa)
observed cyst » observed cost (Expandir a Pesquisa), observed case (Expandir a Pesquisa), observed crista (Expandir a Pesquisa)
bent nervous » get nervous (Expandir a Pesquisa), cental nervous (Expandir a Pesquisa), center nervous (Expandir a Pesquisa)
system dan » system data (Expandir a Pesquisa), system dias (Expandir a Pesquisa), system der (Expandir a Pesquisa)
nerve van » nerve vas (Expandir a Pesquisa), nerve can (Expandir a Pesquisa), herve van (Expandir a Pesquisa)
van dis » van die (Expandir a Pesquisa), van diest (Expandir a Pesquisa), van dijk (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( _ prevent nerve van dis ) or ((( j best observed cyst due ) or ( j bent nervous system dan ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ prevent nerve van dis ) OR ((( j best observed cyst due ) OR ( j bent nervous system dan )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ prevent nerve van dis ) or ((( j best observed cyst due ) or ( j bent nervous system dan ))))*.