Talvez deva tentar algumas variações de ortografia:
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
fact complex » factor complex (Expandir a Pesquisa), factor complexes (Expandir a Pesquisa), coat complex (Expandir a Pesquisa)
complex tear » complex tears (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
carlos rojek » carlos nojek (Expandir a Pesquisa), carlos rojas (Expandir a Pesquisa), carlos roger (Expandir a Pesquisa)
ning carlos » nino carlos (Expandir a Pesquisa), nin carlos (Expandir a Pesquisa), ing carlos (Expandir a Pesquisa)
tear from » tears from (Expandir a Pesquisa), year from (Expandir a Pesquisa), fear from (Expandir a Pesquisa)
nacl ning » nacl using (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 fact » 5 facet (Expandir a Pesquisa), 5 facts (Expandir a Pesquisa), _ fact (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 _ cooper jason _ ) or ((( 5 fact complex tear from ) or ( 7.5 nacl ning carlos rojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ cooper jason _ ) OR ((( 5 fact complex tear from ) OR ( 7.5 nacl ning carlos rojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ cooper jason _ ) or ((( 5 fact complex tear from ) or ( 7.5 nacl ning carlos rojek ))))*.