Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
cost computer » chest computed (Expandir a Pesquisa), joint computer (Expandir a Pesquisa), about computer (Expandir a Pesquisa)
natl complex » nata complex (Expandir a Pesquisa), pal complex (Expandir a Pesquisa), al complex (Expandir a Pesquisa)
complex than » complex trait (Expandir a Pesquisa)
rat compare » rat compared (Expandir a Pesquisa), rate compare (Expandir a Pesquisa), rats compare (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
0 cost » 30 cost (Expandir a Pesquisa), _ cost (Expandir a Pesquisa), a cost (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
j rat » j rath (Expandir a Pesquisa), _ rat (Expandir a Pesquisa), a rat (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: (((( 0 cost computer based now ) or ( j natl complex than non ))) or ( j rat compare _ now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 0 cost computer based now ) OR ( j natl complex than non ))) OR ( j rat compare _ now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 0 cost computer based now ) or ( j natl complex than non ))) or ( j rat compare _ now ))*.