Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
how computers » held computers (Expandir a Pesquisa), from computers (Expandir a Pesquisa), _ computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
compared a » compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
a elderly » _ elderly (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), phan ngoc (Expandir a Pesquisa)
a nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
note » none (Expandir a Pesquisa), node (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: (( _ how computers can ngoc ) or ((( a nacl compared _ now ) or ( a elderly compared a note ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ how computers can ngoc ) OR ((( a nacl compared _ now ) OR ( a elderly compared a note )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ how computers can ngoc ) or ((( a nacl compared _ now ) or ( a elderly compared a note ))))*.