Talvez deva tentar algumas variações de ortografia:
comparing cause » comparing causes (Expandir a Pesquisa), comparing case (Expandir a Pesquisa), comparing causal (Expandir a Pesquisa)
art comparing » rct comparing (Expandir a Pesquisa), ct comparing (Expandir a Pesquisa), fat comparing (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
combe can » pombe can (Expandir a Pesquisa), combe juan (Expandir a Pesquisa), combe jean (Expandir a Pesquisa)
cause new » causes new (Expandir a Pesquisa), use new (Expandir a Pesquisa), cause non (Expandir a Pesquisa)
la compr » la compra (Expandir a Pesquisa), la compre (Expandir a Pesquisa), la coma (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
j art » j arts (Expandir a Pesquisa), j arlt (Expandir a Pesquisa), _ art (Expandir a Pesquisa)
j la » j a (Expandir a Pesquisa), j l (Expandir a Pesquisa), j da (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: (((( j la compr can netw ) or ( j la combe can netw ))) or ( j art comparing cause new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j la compr can netw ) OR ( j la combe can netw ))) OR ( j art comparing cause new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j la compr can netw ) or ( j la combe can netw ))) or ( j art comparing cause new ))*.