Talvez deva tentar algumas variações de ortografia:
paula campo » paula campos (Expandir a Pesquisa), paula campelo (Expandir a Pesquisa), paulo campos (Expandir a Pesquisa)
campo dan » campos dan (Expandir a Pesquisa), campo da (Expandir a Pesquisa), campo das (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
dan ning » yan ning (Expandir a Pesquisa), han ning (Expandir a Pesquisa), tan ning (Expandir a Pesquisa)
nacl amp » nacl a (Expandir a Pesquisa), nacl em (Expandir a Pesquisa), nacl aq (Expandir a Pesquisa)
co2 can » co2 dan (Expandir a Pesquisa), co2 case (Expandir a Pesquisa), co2 dans (Expandir a Pesquisa)
j paula » j pakula (Expandir a Pesquisa), j panula (Expandir a Pesquisa), j paul (Expandir a Pesquisa)
amp dan » smp dan (Expandir a Pesquisa), lpmp dan (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
j li » j l (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 li) or (j i)) co2 can near ) or ((( j paula campo dan ning ) or ( 3 nacl amp dan ning ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( ((j li) OR (j i)) co2 can near ) OR ((( j paula campo dan ning ) OR ( 3 nacl amp dan ning )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( ((j li) or (j i)) co2 can near ) or ((( j paula campo dan ning ) or ( 3 nacl amp dan ning ))))*.