Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
computer code » computer model (Expandir a Pesquisa), computer models (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
compared less » comparee les (Expandir a Pesquisa), comparer les (Expandir a Pesquisa), compared leaf (Expandir a Pesquisa)
a computer » _ computer (Expandir a Pesquisa)
less known » lesser known (Expandir a Pesquisa)
i elderly » _ elderly (Expandir a Pesquisa), a elderly (Expandir a Pesquisa), 2 elderly (Expandir a Pesquisa)
code now » code new (Expandir a Pesquisa), code noir (Expandir a Pesquisa), code net (Expandir a Pesquisa)
j nacl » _ nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa), a nacl (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: (( i a computer code now ) or ((( j nacl compared _ now ) or ( i elderly compared less known ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i a computer code now ) OR ((( j nacl compared _ now ) OR ( i elderly compared less known )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i a computer code now ) or ((( j nacl compared _ now ) or ( i elderly compared less known ))))*.