Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
adp computer » ada computer (Expandir a Pesquisa), capp computer (Expandir a Pesquisa), a computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
compared a » compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
2 elderly » _ elderly (Expandir a Pesquisa), a elderly (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j nacl » _ nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa), a nacl (Expandir a Pesquisa)
i adp » ii adp (Expandir a Pesquisa), _ adp (Expandir a Pesquisa), i amp (Expandir a Pesquisa)
a non » _ non (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 adp computer can non ) or ((( j nacl compared a non ) or ( 2 elderly compared _ now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i adp computer can non ) OR ((( j nacl compared a non ) OR ( 2 elderly compared _ now )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i adp computer can non ) or ((( j nacl compared a non ) or ( 2 elderly compared _ now ))))*.