Talvez debería tentar con algunhas variantes ortográficas:
comparing close » comparing dose (Expandir procura), comparing case (Expandir procura), comparing those (Expandir procura)
narp comparing » larsp comparing (Expandir procura), gap comparing (Expandir procura), apart comparing (Expandir procura)
nacl compared » al compared (Expandir procura), panel compared (Expandir procura), gel compared (Expandir procura)
compared can » compared a (Expandir procura), compared law (Expandir procura), companies can (Expandir procura)
close new » closure new (Expandir procura), close e (Expandir procura), close n (Expandir procura)
clamp can » clamp a (Expandir procura), clamp ar (Expandir procura), clamp cum (Expandir procura)
con nacl » por nacl (Expandir procura)
a clamp » _ clamp (Expandir procura), a claims (Expandir procura)
can net » dan net (Expandir procura), can nt (Expandir procura), clean net (Expandir procura)
c narp » _ narp (Expandir procura), c napp (Expandir procura), c nart (Expandir procura)

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: (((( con nacl compared can new ) or ( c narp comparing close new ))) or ( _ a clamp can net ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( con nacl compared can new ) OR ( c narp comparing close new ))) OR ( _ a clamp can net )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( con nacl compared can new ) or ( c narp comparing close new ))) or ( _ a clamp can net ))*.