Talvez deva tentar algumas variações de ortografia:
levelt compared » levels compared (Expandir a Pesquisa), level compared (Expandir a Pesquisa), cement compared (Expandir a Pesquisa)
computer based » computer aided (Expandir a Pesquisa)
early compared » early computed (Expandir a Pesquisa), daily compared (Expandir a Pesquisa), elderly compared (Expandir a Pesquisa)
call computer » small computer (Expandir a Pesquisa), scale computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared law (Expandir a Pesquisa), compared cases (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
based new » based next (Expandir a Pesquisa), based near (Expandir a Pesquisa), based n (Expandir a Pesquisa)
j levelt » f levelt (Expandir a Pesquisa), j levell (Expandir a Pesquisa), j levels (Expandir a Pesquisa)
a early » a earley (Expandir a Pesquisa), a earl (Expandir a Pesquisa), via early (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 call computer based new ) or ((( j levelt compared can new ) or ( a early compared a non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i call computer based new ) OR ((( j levelt compared can new ) OR ( a early compared a non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i call computer based new ) or ((( j levelt compared can new ) or ( a early compared a non ))))*.