Talvez deva tentar algumas variações de ortografia:
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
dental merve » dental nerve (Expandir a Pesquisa), dental nerves (Expandir a Pesquisa), senal merve (Expandir a Pesquisa)
crest nerve » treat nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
i central » coli central (Expandir a Pesquisa), hemi central (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
j dental » j delta (Expandir a Pesquisa), j dent (Expandir a Pesquisa), j deal (Expandir a Pesquisa)
j crest » _ crest (Expandir a Pesquisa), a crest (Expandir a Pesquisa), j crespo (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (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: (((( i central nerve system dis ) or ( j crest nerve system dis ))) or ( j dental merve can dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( i central nerve system dis ) OR ( j crest nerve system dis ))) OR ( j dental merve can dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i central nerve system dis ) or ( j crest nerve system dis ))) or ( j dental merve can dis ))*.