Talvez deva tentar algumas variações de ortografia:
cobalt complex » cobalt complexes (Expandir a Pesquisa)
complex trait » complex traits (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
carlos rojek » carlos nojek (Expandir a Pesquisa), carlos rojas (Expandir a Pesquisa), carlos roger (Expandir a Pesquisa)
kcl carlos » gil carlos (Expandir a Pesquisa), del carlos (Expandir a Pesquisa), el carlos (Expandir a Pesquisa)
l cooper » _ cooper (Expandir a Pesquisa), m cooper (Expandir a Pesquisa), a cooper (Expandir a Pesquisa)
5 cobalt » _ cobalt (Expandir a Pesquisa), a cobalt (Expandir a Pesquisa), 1 cobalt (Expandir a Pesquisa)
trait co » trait can (Expandir a Pesquisa), trait _ (Expandir a Pesquisa), trait a (Expandir a Pesquisa)
jason a » jason _ (Expandir a Pesquisa)
nacl » natl (Expandir a Pesquisa), nac (Expandir a Pesquisa), nucl (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 a ) or ((( 5 cobalt complex trait co ) or ( 0.9 nacl kcl carlos rojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l cooper jason a ) OR ((( 5 cobalt complex trait co ) OR ( 0.9 nacl kcl carlos rojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l cooper jason a ) or ((( 5 cobalt complex trait co ) or ( 0.9 nacl kcl carlos rojek ))))*.