Talvez deva tentar algumas variações de ortografia:
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
nmr compared » mr compared (Expandir a Pesquisa), pcr compared (Expandir a Pesquisa), ukr compared (Expandir a Pesquisa)
compared law » compared _ (Expandir a Pesquisa), company law (Expandir a Pesquisa), compare a (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
camp can » clamp can (Expandir a Pesquisa), camp ca (Expandir a Pesquisa), amp can (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
law new » jaw new (Expandir a Pesquisa)
et camp » et champ (Expandir a Pesquisa), et campi (Expandir a Pesquisa), et campo (Expandir a Pesquisa)
j nacl » _ nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa), a nacl (Expandir a Pesquisa)
j nmr » _ nmr (Expandir a Pesquisa), h nmr (Expandir a Pesquisa), c nmr (Expandir a Pesquisa)
_ et » _ pet (Expandir a Pesquisa), _ net (Expandir a Pesquisa), _ wet (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 nacl compared a neto ) OR ( j nmr compared law new ))) OR ( _ et camp can netw ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nacl compared a neto ) OR ( j nmr compared law new ))) OR ( _ et camp can netw ))*.