Talvez deva tentar algumas variações de ortografia:
facts complex » fact complex (Expandir a Pesquisa), factors complex (Expandir a Pesquisa), factor complex (Expandir a Pesquisa)
complex trait » complex traits (Expandir a Pesquisa)
carlos rojek » carlos nojek (Expandir a Pesquisa), carlos rojas (Expandir a Pesquisa), carlos roger (Expandir a Pesquisa)
kuhl carlos » gual carlos (Expandir a Pesquisa), riehl carlos (Expandir a Pesquisa), diehl carlos (Expandir a Pesquisa)
nacl kuhl » nacl kcl (Expandir a Pesquisa)
m cooper » _ cooper (Expandir a Pesquisa), j cooper (Expandir a Pesquisa)
trait ou » traiter ou (Expandir a Pesquisa), trait _ (Expandir a Pesquisa), trait a (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 facts » 15 facts (Expandir a Pesquisa), _ facts (Expandir a Pesquisa), 1 facts (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 cooper john n ) or ((( 5 facts complex trait ou ) or ( 7.5 nacl kuhl carlos rojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m cooper john n ) OR ((( 5 facts complex trait ou ) OR ( 7.5 nacl kuhl carlos rojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m cooper john n ) or ((( 5 facts complex trait ou ) or ( 7.5 nacl kuhl carlos rojek ))))*.