Talvez deva tentar algumas variações de ortografia:
deaths observed » death observed (Expandir a Pesquisa), decades observed (Expandir a Pesquisa), beaks observed (Expandir a Pesquisa)
observed cost » observed post (Expandir a Pesquisa), observed close (Expandir a Pesquisa), observed court (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dds (Expandir a Pesquisa)
bent merve » bent nerve (Expandir a Pesquisa), becit merve (Expandir a Pesquisa), belit merve (Expandir a Pesquisa)
j deaths » _ deaths (Expandir a Pesquisa), 2 deaths (Expandir a Pesquisa), 6 deaths (Expandir a Pesquisa)
cost dis » cost does (Expandir a Pesquisa), chest dis (Expandir a Pesquisa), cost diet (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can bddcs (Expandir a Pesquisa)
a cent » a cena (Expandir a Pesquisa), a cenp (Expandir a Pesquisa), a center (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (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: (( a cent nerve system dis ) or ((( j deaths observed cost dis ) or ( j bent merve can dcs ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a cent nerve system dis ) OR ((( j deaths observed cost dis ) OR ( j bent merve can dcs )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a cent nerve system dis ) or ((( j deaths observed cost dis ) or ( j bent merve can dcs ))))*.