Talvez deva tentar algumas variações de ortografia:
neural system » neural systems (Expandir a Pesquisa), neural stem (Expandir a Pesquisa), neuron system (Expandir a Pesquisa)
direct neural » direct neuronal (Expandir a Pesquisa), direct peroral (Expandir a Pesquisa), direct oral (Expandir a Pesquisa)
serve case » nerve case (Expandir a Pesquisa), service case (Expandir a Pesquisa), nerve cases (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
j direct » j director (Expandir a Pesquisa), nhj direct (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)
j can » j cano (Expandir a Pesquisa), j cant (Expandir a Pesquisa), _ can (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 can serve case dis ) or ((( j direct neural system dis ) or ( j bent nerve cat due ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j can serve case dis ) OR ((( j direct neural system dis ) OR ( j bent nerve cat due )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j can serve case dis ) or ((( j direct neural system dis ) or ( j bent nerve cat due ))))*.