Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
compared leaf » compared law (Expandir a Pesquisa), compared less (Expandir a Pesquisa), compared great (Expandir a Pesquisa)
gel compared » model compared (Expandir a Pesquisa), level compared (Expandir a Pesquisa)
a computer » _ computer (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
a elderly » _ elderly (Expandir a Pesquisa), care elderly (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
leaf et » leaf end (Expandir a Pesquisa)
_ gel » _ geo (Expandir a Pesquisa), _ get (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 a computer case now ) or ((( _ gel compared a non ) or ( a elderly compared leaf et ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i a computer case now ) OR ((( _ gel compared a non ) OR ( a elderly compared leaf et )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i a computer case now ) or ((( _ gel compared a non ) or ( a elderly compared leaf et ))))*.