Talvez deva tentar algumas variações de ortografia:
paul coop » paul cool (Expandir a Pesquisa), paul cooper (Expandir a Pesquisa), paul coppo (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
coop dan » loop dan (Expandir a Pesquisa), cooper dan (Expandir a Pesquisa), coop alan (Expandir a Pesquisa)
dan ning » yan ning (Expandir a Pesquisa), han ning (Expandir a Pesquisa), tan ning (Expandir a Pesquisa)
c.m can » c.m calo (Expandir a Pesquisa)
nacl co » nacl co2 (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa), nacl kno (Expandir a Pesquisa)
com non » com noni (Expandir a Pesquisa), cm non (Expandir a Pesquisa), com noz (Expandir a Pesquisa)
com nin » com ni (Expandir a Pesquisa), hom nin (Expandir a Pesquisa), com lenin (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
i c.m » li c.m (Expandir a Pesquisa), i cam (Expandir a Pesquisa), i com (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 i c.m can near ) or ((( j paul coop dan ning ) or ( 3 nacl co ((com non) OR (com nin)) ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j i c.m can near ) OR ((( j paul coop dan ning ) OR ( 3 nacl co ((com non) OR (com nin)) ))))*.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j i c.m can near ) or ((( j paul coop dan ning ) or ( 3 nacl co ((com non) OR (com nin)) ))))*".