Talvez deva tentar algumas variações de ortografia:
nacl compared » al compared (Expandir a Pesquisa), panel compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
compared can » compared law (Expandir a Pesquisa), companies can (Expandir a Pesquisa), compared _ (Expandir a Pesquisa)
rat compared » rats compared (Expandir a Pesquisa), rate compared (Expandir a Pesquisa), fat compared (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
can neth » can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa), can new (Expandir a Pesquisa)
net coop » net co (Expandir a Pesquisa), net cost (Expandir a Pesquisa)
coop can » loop can (Expandir a Pesquisa), coop alan (Expandir a Pesquisa), coop a (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa)
_ net » _ new (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": "(((( 3.5 nacl compared can neth ) OR ( _ rat compared a neto ))) OR ( _ net coop can ngoc ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 3.5 nacl compared can neth ) OR ( _ rat compared a neto ))) OR ( _ net coop can ngoc ))*.