Talvez deva tentar algumas variações de ortografia:
deltas observed » deaths observed (Expandir a Pesquisa), deltas served (Expandir a Pesquisa), cells observed (Expandir a Pesquisa)
observed cost » observed post (Expandir a Pesquisa), observed close (Expandir a Pesquisa), observed case (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
cena nerve » renal nerve (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
nerve cyst » nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa)
_ deltas » _ delta (Expandir a Pesquisa), _ delta1 (Expandir a Pesquisa), _ delta9 (Expandir a Pesquisa)
cost due » costs due (Expandir a Pesquisa), lost due (Expandir a Pesquisa), cyst due (Expandir a Pesquisa)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa), j center (Expandir a Pesquisa)
i cena » a cena (Expandir a Pesquisa), _ cena (Expandir a Pesquisa), e cena (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 cent nerve case dis ) or ( i cena nerve cyst dis ))) or ( _ deltas observed cost due ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j cent nerve case dis ) OR ( i cena nerve cyst dis ))) OR ( _ deltas observed cost due )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cent nerve case dis ) or ( i cena nerve cyst dis ))) or ( _ deltas observed cost due ))*.