Talvez deva tentar algumas variações de ortografia:
deltas served » adults served (Expandir a Pesquisa), delta survey (Expandir a Pesquisa)
delta nurses » data nurses (Expandir a Pesquisa), delta viruses (Expandir a Pesquisa), delta biases (Expandir a Pesquisa)
crest nerve » treat nerve (Expandir a Pesquisa), crest derived (Expandir a Pesquisa), current nerve (Expandir a Pesquisa)
served case » observed case (Expandir a Pesquisa), saved case (Expandir a Pesquisa), observed cases (Expandir a Pesquisa)
nurses cyst » nurses case (Expandir a Pesquisa), nurses cease (Expandir a Pesquisa), nurses cross (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa)
j deltas » _ deltas (Expandir a Pesquisa), j delmas (Expandir a Pesquisa), o deltas (Expandir a Pesquisa)
case de » case due (Expandir a Pesquisa), case d (Expandir a Pesquisa)
j delta » j della (Expandir a Pesquisa), j delton (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: (( _ crest nerve cyst dis ) or ((( j deltas served case de ) or ( j delta nurses cyst dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ crest nerve cyst dis ) OR ((( j deltas served case de ) OR ( j delta nurses cyst dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ crest nerve cyst dis ) or ((( j deltas served case de ) or ( j delta nurses cyst dis ))))*.