Talvez deva tentar algumas variações de ortografia:
hartl computer » heart computer (Expandir a Pesquisa), harmful computer (Expandir a Pesquisa), shared computer (Expandir a Pesquisa)
model compared » model compound (Expandir a Pesquisa), model complex (Expandir a Pesquisa), model combined (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
combe can » pombe can (Expandir a Pesquisa), combe juan (Expandir a Pesquisa), combe jean (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
j hartl » c hartl (Expandir a Pesquisa), j hart (Expandir a Pesquisa), l hartl (Expandir a Pesquisa)
l combe » la combe (Expandir a Pesquisa), _ combe (Expandir a Pesquisa), l combs (Expandir a Pesquisa)
j model » j modolo (Expandir a Pesquisa), j monder (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.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j hartl computer can newts ) OR ( j l combe can near ))) OR ( j model compared a non ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j hartl computer can newts ) OR ( j l combe can near ))) OR ( j model compared a non ))*.