Talvez deva tentar algumas variações de ortografia:
unit comparing » audit comparing (Expandir a Pesquisa), quit comparing (Expandir a Pesquisa), unit computing (Expandir a Pesquisa)
comparing case » comparing cancer (Expandir a Pesquisa), compelling case (Expandir a Pesquisa), comparing climate (Expandir a Pesquisa)
nat computers » what computers (Expandir a Pesquisa), iet computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
yl computer » il computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j unit » j unio (Expandir a Pesquisa), b unit (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (Expandir a Pesquisa)
3 yl » 2 yl (Expandir a Pesquisa), 1 yl (Expandir a Pesquisa), 4 yl (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: (((( j nat computers can now ) or ( 3 yl computer case now ))) or ( j unit comparing case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat computers can now ) OR ( 3 yl computer case now ))) OR ( j unit comparing case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat computers can now ) or ( 3 yl computer case now ))) or ( j unit comparing case now ))*.