Talvez deva tentar algumas variações de ortografia:
serrano carlos » sorzano carlos (Expandir a Pesquisa)
nacl serrano » nadal serrano (Expandir a Pesquisa), a.l serrano (Expandir a Pesquisa), sael serrano (Expandir a Pesquisa)
cobalt tris » cobalt trial (Expandir a Pesquisa), cobalt bis (Expandir a Pesquisa), cobalt thin (Expandir a Pesquisa)
carlos nora » carlos mora (Expandir a Pesquisa), carlos nara (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa)
six combs » sex combs (Expandir a Pesquisa), wax combs (Expandir a Pesquisa)
_ ethane » _ ethanol (Expandir a Pesquisa), _ ethno (Expandir a Pesquisa)
tris ngo » trips ngo (Expandir a Pesquisa), tri ngo (Expandir a Pesquisa), trinh ngo (Expandir a Pesquisa)
combs c » combs _ (Expandir a Pesquisa)
a six » _ six (Expandir a Pesquisa)
c net » c neto (Expandir a Pesquisa), _ net (Expandir a Pesquisa), c neu (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: (( a six combs c net ) or ((( _ ethane cobalt tris ngo ) or ( 0.9 nacl serrano carlos nora ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a six combs c net ) OR ((( _ ethane cobalt tris ngo ) OR ( 0.9 nacl serrano carlos nora )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a six combs c net ) or ((( _ ethane cobalt tris ngo ) or ( 0.9 nacl serrano carlos nora ))))*.