Talvez deva tentar algumas variações de ortografia:
level comparison » model comparison (Expandir a Pesquisa), global comparison (Expandir a Pesquisa), al comparison (Expandir a Pesquisa)
comparison laws » comparison bats (Expandir a Pesquisa), comparison land (Expandir a Pesquisa), comparison les (Expandir a Pesquisa)
aids computers » minds computers (Expandir a Pesquisa), brains computers (Expandir a Pesquisa), radios computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
carlos now » carlos noa (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos novo (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa)
j level » j levell (Expandir a Pesquisa), j levels (Expandir a Pesquisa), j levelt (Expandir a Pesquisa)
laws do » laws d (Expandir a Pesquisa), laws how (Expandir a Pesquisa)
a cony » a colony (Expandir a Pesquisa), a conboy (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: (( _ aids computers can non ) or ((( j level comparison laws do ) or ( j a cony carlos now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ aids computers can non ) OR ((( j level comparison laws do ) OR ( j a cony carlos now )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ aids computers can non ) or ((( j level comparison laws do ) or ( j a cony carlos now ))))*.