Talvez deva tentar algumas variações de ortografia:
states compared » rates compared (Expandir a Pesquisa), cases compared (Expandir a Pesquisa), diabetes compared (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
compared law » compared a (Expandir a Pesquisa), compared _ (Expandir a Pesquisa), company law (Expandir a Pesquisa)
l computer » il computer (Expandir a Pesquisa), al computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
camp can » clamp can (Expandir a Pesquisa), camp ca (Expandir a Pesquisa), amp can (Expandir a Pesquisa)
j states » j staples (Expandir a Pesquisa), j staines (Expandir a Pesquisa), j stacey (Expandir a Pesquisa)
law note » law notes (Expandir a Pesquisa), law noise (Expandir a Pesquisa), law non (Expandir a Pesquisa)
la camp » la campa (Expandir a Pesquisa), la cama (Expandir a Pesquisa), la cam (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j la » j a (Expandir a Pesquisa), j da (Expandir a Pesquisa), j li (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 l computer can new ) OR ( j la camp can now ))) OR ( j states compared law note ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j l computer can new ) OR ( j la camp can now ))) OR ( j states compared law note ))*.