Talvez deva tentar algumas variações de ortografia:
comparing case » comparing cancer (Expandir a Pesquisa), compelling case (Expandir a Pesquisa), comparison case (Expandir a Pesquisa)
natl computers » small computers (Expandir a Pesquisa), panel computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
computer code » computer model (Expandir a Pesquisa), computer models (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
fat comparing » rct comparing (Expandir a Pesquisa), ct comparing (Expandir a Pesquisa), art comparing (Expandir a Pesquisa)
code ngo » code ndc (Expandir a Pesquisa), code net (Expandir a Pesquisa), code new (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
3 vhdl » _ vhdl (Expandir a Pesquisa), a vhdl (Expandir a Pesquisa)
j fat » j fath (Expandir a Pesquisa), _ fat (Expandir a Pesquisa), a fat (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 natl computers _ now ) or ( 3 vhdl computer code ngo ))) or ( j fat comparing case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl computers _ now ) OR ( 3 vhdl computer code ngo ))) OR ( j fat comparing case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl computers _ now ) or ( 3 vhdl computer code ngo ))) or ( j fat comparing case now ))*.