Talvez debería tentar con algunhas variantes ortográficas:
mineral complex » several complex (Expandir procura), central complex (Expandir procura)
complex tetrex » complex trex (Expandir procura), complex tethered (Expandir procura), complex tetramer (Expandir procura)
knopf carlos » prof carlos (Expandir procura)
carlos noel » carlos noe (Expandir procura), carlos joel (Expandir procura), carlos yoel (Expandir procura)
comps john » copps john (Expandir procura), combs john (Expandir procura), comisi john (Expandir procura)
nacl knopf » nacl kno (Expandir procura)
5 mineral » _ mineral (Expandir procura), a mineral (Expandir procura), 2 mineral (Expandir procura)
john noe » john noel (Expandir procura), john noh (Expandir procura), john noble (Expandir procura)
7.5 nacl » 3.5 nacl (Expandir procura), 0.9 nacl (Expandir procura)
l comps » m comps (Expandir procura)
ngoc » ngo (Expandir procura)

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 john noe ) or ((( 5 mineral complex tetrex ngoc ) or ( 7.5 nacl knopf carlos noel ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comps john noe ) OR ((( 5 mineral complex tetrex ngoc ) OR ( 7.5 nacl knopf carlos noel )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps john noe ) or ((( 5 mineral complex tetrex ngoc ) or ( 7.5 nacl knopf carlos noel ))))*.