Talvez deva tentar algumas variações de ortografia:
complex optical » computed optical (Expandir a Pesquisa), complex medical (Expandir a Pesquisa), compact optical (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
rene carlos » sune carlos (Expandir a Pesquisa), freire carlos (Expandir a Pesquisa), leite carlos (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
comps los » comps la (Expandir a Pesquisa)
optical n » optical na (Expandir a Pesquisa), optimal n (Expandir a Pesquisa), optical nlo (Expandir a Pesquisa)
nacl rene » nacl en (Expandir a Pesquisa)
0.9 nacl » 3.5 nacl (Expandir a Pesquisa)
l comps » m comps (Expandir a Pesquisa)
los new » loss new (Expandir a Pesquisa), los neo (Expandir a Pesquisa)
5 metal » 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 l comps los new ) or ((( 5 metal complex optical n ) or ( 0.9 nacl rene carlos nava ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comps los new ) OR ((( 5 metal complex optical n ) OR ( 0.9 nacl rene carlos nava )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps los new ) or ((( 5 metal complex optical n ) or ( 0.9 nacl rene carlos nava ))))*.