Talvez deva tentar algumas variações de ortografia:
mineral complex » several complex (Expandir a Pesquisa), central complex (Expandir a Pesquisa)
complex tetrex » complex trex (Expandir a Pesquisa), complex tetramer (Expandir a Pesquisa), complex tethered (Expandir a Pesquisa)
carlos noel » carlos joel (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos yoel (Expandir a Pesquisa)
23 mineral » 2 mineral (Expandir a Pesquisa), _ mineral (Expandir a Pesquisa), a mineral (Expandir a Pesquisa)
co2 carlos » 232 carlos (Expandir a Pesquisa), co2 carbon (Expandir a Pesquisa), co2 cenarios (Expandir a Pesquisa)
copp john » copps john (Expandir a Pesquisa), dopp john (Expandir a Pesquisa), cupp john (Expandir a Pesquisa)
john noe » john noel (Expandir a Pesquisa), john noh (Expandir a Pesquisa), john noble (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl co2 » nacl co (Expandir a Pesquisa)
m copp » _ copp (Expandir a Pesquisa), j copp (Expandir a Pesquisa), r copp (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 m copp john noe ) OR ((( 23 mineral complex tetrex ngoc ) OR ( 7.5 nacl co2 carlos noel ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j m copp john noe ) OR ((( 23 mineral complex tetrex ngoc ) OR ( 7.5 nacl co2 carlos noel ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m copp john noe ) OR ((( 23 mineral complex tetrex ngoc ) OR ( 7.5 nacl co2 carlos noel ))))*.