Talvez deva tentar algumas variações de ortografia:
reserve system » research system (Expandir a Pesquisa), research systems (Expandir a Pesquisa)
augment nerve » segment nerve (Expandir a Pesquisa), augment gene (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
crest nerve » treat nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
system ds » system dss (Expandir a Pesquisa), system des (Expandir a Pesquisa), system de (Expandir a Pesquisa)
_ augment » _ augmented (Expandir a Pesquisa)
a reserve » a reserva (Expandir a Pesquisa)
system d » system de (Expandir a Pesquisa), system der (Expandir a Pesquisa), system des (Expandir a Pesquisa)
j crest » _ crest (Expandir a Pesquisa), a crest (Expandir a Pesquisa), 5 crest (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 system ds ) or ((( _ augment nerve system ds ) or ( j a reserve system d ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j crest nerve system ds ) OR ((( _ augment nerve system ds ) OR ( j a reserve system d )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j crest nerve system ds ) or ((( _ augment nerve system ds ) or ( j a reserve system d ))))*.