Talvez deva tentar algumas variações de ortografia:
nacl comet » nacl content (Expandir a Pesquisa), nacl complex (Expandir a Pesquisa)
comer dan » romer dan (Expandir a Pesquisa), comer diane (Expandir a Pesquisa), comer vann (Expandir a Pesquisa)
nor clamp » hour clamp (Expandir a Pesquisa), pcr clamp (Expandir a Pesquisa), new clamp (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
comet van » comer vann (Expandir a Pesquisa), comet jean (Expandir a Pesquisa), comet a (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
a comer » a comerma (Expandir a Pesquisa), a comedy (Expandir a Pesquisa)
dan net » dan neal (Expandir a Pesquisa)
van ngo » van ngoc (Expandir a Pesquisa), toan ngo (Expandir a Pesquisa)
2 nor » _ nor (Expandir a Pesquisa), 2 non (Expandir a Pesquisa), 2 no3 (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 a comer dan net ) OR ((( 2 nor clamp can new ) OR ( 3.5 nacl comet van ngo ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j a comer dan net ) OR ((( 2 nor clamp can new ) OR ( 3.5 nacl comet van ngo ))))*.