Talvez deva tentar algumas variações de ortografia:
studies computer » students computer (Expandir a Pesquisa), studies completed (Expandir a Pesquisa), studies computing (Expandir a Pesquisa)
natl computers » small computers (Expandir a Pesquisa), panel computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
nat compared » fat compared (Expandir a Pesquisa), rat compared (Expandir a Pesquisa), cat compared (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
1 studies » 2 studies (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), j natali (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (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 can new ) or ( 1 studies computer a new ))) or ( j nat compared a new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl computers can new ) OR ( 1 studies computer a new ))) OR ( j nat compared a new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl computers can new ) or ( 1 studies computer a new ))) or ( j nat compared a new ))*.