Talvez deva tentar algumas variações de ortografia:
pakula eman » pakula roman (Expandir a Pesquisa), pakula alan (Expandir a Pesquisa), pakula ryan (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
j pakula » j panula (Expandir a Pesquisa), j paula (Expandir a Pesquisa), j padulo (Expandir a Pesquisa)
eman dan » teman dan (Expandir a Pesquisa), iman dan (Expandir a Pesquisa), aman dan (Expandir a Pesquisa)
dan ning » yan ning (Expandir a Pesquisa), han ning (Expandir a Pesquisa), tan ning (Expandir a Pesquisa)
nacl co2 » nacl co (Expandir a Pesquisa)
co2 dan » co2 dans (Expandir a Pesquisa), co2 can (Expandir a Pesquisa), co2 da (Expandir a Pesquisa)
dan now » dan non (Expandir a Pesquisa), can now (Expandir a Pesquisa), plan now (Expandir a Pesquisa)
l c.m » l com (Expandir a Pesquisa), l cam (Expandir a Pesquisa), l c.h (Expandir a Pesquisa)
_ c.m » _ cam (Expandir a Pesquisa), _ cbm (Expandir a Pesquisa), _ ccm (Expandir a Pesquisa)

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: (( j ((l c.m) OR (_ c.m)) can near ) or ((( j pakula eman dan ning ) or ( m nacl co2 dan now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j ((l c.m) OR (_ c.m)) can near ) OR ((( j pakula eman dan ning ) OR ( m nacl co2 dan now )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j ((l c.m) OR (_ c.m)) can near ) or ((( j pakula eman dan ning ) or ( m nacl co2 dan now ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j ((l c.m) OR (_ c.m)) can near ) or ((( j pakula eman dan ning ) or ( m nacl co2 dan now ))))*.