Talvez deva tentar algumas variações de ortografia:
fetal nervous » central nervous (Expandir a Pesquisa), viral nervous (Expandir a Pesquisa)
nerve system » drive system (Expandir a Pesquisa)
crest nerve » treat nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system das (Expandir a Pesquisa)
system di » system de (Expandir a Pesquisa), system d (Expandir a Pesquisa), system dias (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
j crest » _ crest (Expandir a Pesquisa), a crest (Expandir a Pesquisa), 5 crest (Expandir a Pesquisa)
1 fetal » _ fetal (Expandir a Pesquisa), a fetal (Expandir a Pesquisa), 1 female (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j crest nerve case dis ) or ( i bent nerve system dis ))) or ( 1 fetal nervous system di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j crest nerve case dis ) OR ( i bent nerve system dis ))) OR ( 1 fetal nervous system di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j crest nerve case dis ) or ( i bent nerve system dis ))) or ( 1 fetal nervous system di ))*.