Talvez deva tentar algumas variações de ortografia:
cobalt complex » cobalt complexes (Expandir a Pesquisa)
menino nelson » merino nelson (Expandir a Pesquisa), delfino nelson (Expandir a Pesquisa), mendez nelson (Expandir a Pesquisa)
nelson robert » wilson robert (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
complex than » complex trait (Expandir a Pesquisa)
l cooper » _ cooper (Expandir a Pesquisa), i cooper (Expandir a Pesquisa), m cooper (Expandir a Pesquisa)
5 cobalt » _ cobalt (Expandir a Pesquisa), n cobalt (Expandir a Pesquisa), a cobalt (Expandir a Pesquisa)
than nlo » than nls (Expandir a Pesquisa), than npls (Expandir a Pesquisa), than non (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
jason c » jason _ (Expandir a Pesquisa), jason a (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 cooper jason c ) or ((( 5 cobalt complex than nlo ) or ( 3.5 nacl menino nelson robert ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l cooper jason c ) OR ((( 5 cobalt complex than nlo ) OR ( 3.5 nacl menino nelson robert )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l cooper jason c ) or ((( 5 cobalt complex than nlo ) or ( 3.5 nacl menino nelson robert ))))*.