Talvez deva tentar algumas variações de ortografia:
using computers » using computer (Expandir a Pesquisa), using computed (Expandir a Pesquisa), using computerized (Expandir a Pesquisa)
unit computer » units computers (Expandir a Pesquisa), tunis computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
wart compared » warts compared (Expandir a Pesquisa), ward compared (Expandir a Pesquisa), art compared (Expandir a Pesquisa)
computer can » computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer code (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
6j using » j using (Expandir a Pesquisa), sgj using (Expandir a Pesquisa), tmj using (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
can now » can ngoc (Expandir a Pesquisa)
j unit » _ unit (Expandir a Pesquisa), a unit (Expandir a Pesquisa), 3 unit (Expandir a Pesquisa)
j wart » j ward (Expandir a Pesquisa), j watt (Expandir a Pesquisa), j ware (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 unit computer can non ) or ( 6j using computers can now ))) or ( j wart compared can new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j unit computer can non ) OR ( 6j using computers can now ))) OR ( j wart compared can new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j unit computer can non ) or ( 6j using computers can now ))) or ( j wart compared can new ))*.