Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
computed code » computer code (Expandir a Pesquisa), computer codes (Expandir a Pesquisa), computer coded (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
ray computed » beam computed (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
code non » codes non (Expandir a Pesquisa), node non (Expandir a Pesquisa), mode non (Expandir a Pesquisa)
c clamp » _ clamp (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
a newt » _ newt (Expandir a Pesquisa), a news (Expandir a Pesquisa), a neat (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: (((( _ elderly compared can near ) or ( j c clamp a newt ))) or ( x ray computed code non ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( _ elderly compared can near ) OR ( j c clamp a newt ))) OR ( x ray computed code non )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ elderly compared can near ) or ( j c clamp a newt ))) or ( x ray computed code non ))*.