Talvez deva tentar algumas variações de ortografia:
compared cases » compared case (Expandir a Pesquisa), collared cases (Expandir a Pesquisa), compares bases (Expandir a Pesquisa)
datta compared » data compared (Expandir a Pesquisa), dtpa compared (Expandir a Pesquisa), data compare (Expandir a Pesquisa)
nat compared » rat compared (Expandir a Pesquisa), fat compared (Expandir a Pesquisa), cat compared (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
nat compare » rat compared (Expandir a Pesquisa), fat compared (Expandir a Pesquisa), rate compare (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
j datta » a datta (Expandir a Pesquisa), _ datta (Expandir a Pesquisa), j dantas (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), e nat (Expandir a Pesquisa), j nay (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( _ nat compare _ netw ) OR ( j nat compared cases new ))) OR ( j datta compared can netw ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ nat compare _ netw ) OR ( j nat compared cases new ))) OR ( j datta compared can netw ))*.