Talvez deva tentar algumas variações de ortografia:
observed system » conserved system (Expandir a Pesquisa), unobserved systems (Expandir a Pesquisa), observing system (Expandir a Pesquisa)
deltas observed » deltas served (Expandir a Pesquisa), cells observed (Expandir a Pesquisa), adults observed (Expandir a Pesquisa)
absent nerve » bent nerve (Expandir a Pesquisa), abducent nerve (Expandir a Pesquisa), augment nerve (Expandir a Pesquisa)
crest nerve » treat nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
system de » system der (Expandir a Pesquisa), system delay (Expandir a Pesquisa)
i absent » ii absent (Expandir a Pesquisa), _ absent (Expandir a Pesquisa), l absent (Expandir a Pesquisa)
can diet » can direct (Expandir a Pesquisa)
j deltas » _ deltas (Expandir a Pesquisa), j delta (Expandir a Pesquisa), j delmas (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( _ crest nerve cyst due ) OR ( i absent nerve can diet ))) OR ( j deltas observed system de ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ crest nerve cyst due ) or ( i absent nerve can diet ))) or ( j deltas observed system de ))*.