Talvez deva tentar algumas variações de ortografia:
casiano carlos » castillo carlos (Expandir a Pesquisa), castro carlos (Expandir a Pesquisa), bacino carlos (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
nacl casiano » angel casiano (Expandir a Pesquisa)
combs bacon » com bacon (Expandir a Pesquisa), combs jason (Expandir a Pesquisa), combs brandon (Expandir a Pesquisa)
carlos nora » carlos mora (Expandir a Pesquisa), carlos nara (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa)
bacon new » bacon's new (Expandir a Pesquisa), bacon neil (Expandir a Pesquisa), bacon e (Expandir a Pesquisa)
tran ngo » tran ngoc (Expandir a Pesquisa), tran ngon (Expandir a Pesquisa), trang ngo (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (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 _ combs bacon new ) OR ((( 5 metal complex tran ngo ) OR ( 7.5 nacl casiano carlos nora ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j _ combs bacon new ) OR ((( 5 metal complex tran ngo ) OR ( 7.5 nacl casiano carlos nora ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs bacon new ) OR ((( 5 metal complex tran ngo ) OR ( 7.5 nacl casiano carlos nora ))))*.