Talvez deva tentar algumas variações de ortografia:
complex birth » complete birth (Expandir a Pesquisa), complex bird (Expandir a Pesquisa), complex biotic (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
nacl bacino » nel bacino (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
john asnet » john agnew (Expandir a Pesquisa), john asger (Expandir a Pesquisa), john agnes (Expandir a Pesquisa)
carlos now » carlos noa (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos novo (Expandir a Pesquisa)
birth ngo » birth age (Expandir a Pesquisa), birth new (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (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 combs john asnet ) OR ((( 5 metal complex birth ngo ) OR ( 3.5 nacl bacino carlos now ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l combs john asnet ) OR ((( 5 metal complex birth ngo ) OR ( 3.5 nacl bacino carlos now ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs john asnet ) OR ((( 5 metal complex birth ngo ) OR ( 3.5 nacl bacino carlos now ))))*.