Talvez deva tentar algumas variações de ortografia:
unit computer » units computers (Expandir a Pesquisa), tunis computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
compr than » tomar than (Expandir a Pesquisa), cpr than (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), phan ngoc (Expandir a Pesquisa)
j unit » j unio (Expandir a Pesquisa), b unit (Expandir a Pesquisa)
a netb » a neto (Expandir a Pesquisa), _ netb (Expandir a Pesquisa), a neta (Expandir a Pesquisa)
j narr » l narr (Expandir a Pesquisa), j nair (Expandir a Pesquisa), j nare (Expandir a Pesquisa)
j care » j carel (Expandir a Pesquisa), j carey (Expandir a Pesquisa), j carne (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j unit computer a netb ) OR ( j narr compr than non ))) OR ( j care compared can ngoc ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j unit computer a netb ) OR ( j narr compr than non ))) OR ( j care compared can ngoc ))*.