Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex trinh » complex thin (Expandir a Pesquisa), complex trans (Expandir a Pesquisa), complex trial (Expandir a Pesquisa)
knopf carlos » prof carlos (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
nacl knopf » nacl kno (Expandir a Pesquisa)
john new » john agnew (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john n (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 7.2 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (Expandir a Pesquisa)
quoc » quo (Expandir a Pesquisa), quot (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 e combs john new ) or ((( 5 metal complex trinh quoc ) or ( 7.5 nacl knopf carlos nara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e combs john new ) OR ((( 5 metal complex trinh quoc ) OR ( 7.5 nacl knopf carlos nara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs john new ) or ((( 5 metal complex trinh quoc ) or ( 7.5 nacl knopf carlos nara ))))*.