Talvez deva tentar algumas variações de ortografia:
complex trinh » complex trial (Expandir a Pesquisa), complex trans (Expandir a Pesquisa), complex tric (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
carlos novo » carlos nino (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos neto (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), combes john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa)
trinh ngoc » dinh ngoc (Expandir a Pesquisa), minh ngoc (Expandir a Pesquisa), thanh ngoc (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa), nacl naoh (Expandir a Pesquisa)
john nee » john new (Expandir a Pesquisa), john neena (Expandir a Pesquisa), john neetu (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (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 _ combs john nee ) OR ((( 5 metal complex trinh ngoc ) OR ( 7.5 nacl nano carlos novo ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j _ combs john nee ) OR ((( 5 metal complex trinh ngoc ) OR ( 7.5 nacl nano carlos novo ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs john nee ) OR ((( 5 metal complex trinh ngoc ) OR ( 7.5 nacl nano carlos novo ))))*.