Talvez deva tentar algumas variações de ortografia:
mineral complex » several complex (Expandir a Pesquisa), central complex (Expandir a Pesquisa)
complex trex » complex tree (Expandir a Pesquisa), complex tetrex (Expandir a Pesquisa), complex text (Expandir a Pesquisa)
nine carlos » nino carlos (Expandir a Pesquisa), nin carlos (Expandir a Pesquisa), gine carlos (Expandir a Pesquisa)
carlos joel » carlson joel (Expandir a Pesquisa), carlos jose (Expandir a Pesquisa), carlos joao (Expandir a Pesquisa)
comps john » copps john (Expandir a Pesquisa), combs john (Expandir a Pesquisa), camps johan (Expandir a Pesquisa)
5 mineral » _ mineral (Expandir a Pesquisa), a mineral (Expandir a Pesquisa), 2 mineral (Expandir a Pesquisa)
trex ngoc » trieu ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), tien ngoc (Expandir a Pesquisa)
nacl nine » nacl nano (Expandir a Pesquisa), nacl tcne (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
l comps » m comps (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 comps john nash ) OR ((( 5 mineral complex trex ngoc ) OR ( 7.5 nacl nine carlos joel ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l comps john nash ) OR ((( 5 mineral complex trex ngoc ) OR ( 7.5 nacl nine carlos joel ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps john nash ) OR ((( 5 mineral complex trex ngoc ) OR ( 7.5 nacl nine carlos joel ))))*.