Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
level compared » levels compared (Expandir a Pesquisa), model compared (Expandir a Pesquisa), level comparison (Expandir a Pesquisa)
earl compared » early compared (Expandir a Pesquisa), meal compared (Expandir a Pesquisa), al compared (Expandir a Pesquisa)
compared laws » compared law (Expandir a Pesquisa), compared less (Expandir a Pesquisa), compiled laws (Expandir a Pesquisa)
compared can » compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa), companies can (Expandir a Pesquisa)
a computer » _ computer (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
laws how » laws h (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
a earl » _ earl (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 a computer based now ) or ((( _ level compared can now ) or ( a earl compared laws how ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i a computer based now ) OR ((( _ level compared can now ) OR ( a earl compared laws how )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i a computer based now ) or ((( _ level compared can now ) or ( a earl compared laws how ))))*.