Talvez deva tentar algumas variações de ortografia:
methyl complex » metal complex (Expandir a Pesquisa), method complex (Expandir a Pesquisa), methylase complex (Expandir a Pesquisa)
complex trait » complex traits (Expandir a Pesquisa)
knopf carlos » prof carlos (Expandir a Pesquisa)
carlos rojek » carlos nojek (Expandir a Pesquisa), carlos rojas (Expandir a Pesquisa), carlos roger (Expandir a Pesquisa)
nacl knopf » nacl kno (Expandir a Pesquisa)
combs non » combs john (Expandir a Pesquisa), combat non (Expandir a Pesquisa), combs jan (Expandir a Pesquisa)
trait noa » strait noah (Expandir a Pesquisa), trait a (Expandir a Pesquisa), trait co (Expandir a Pesquisa)
non nest » non nests (Expandir a Pesquisa), non net (Expandir a Pesquisa), non nested (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (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 _ combs non nest ) or ((( 5 methyl complex trait noa ) or ( 3 nacl knopf carlos rojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs non nest ) OR ((( 5 methyl complex trait noa ) OR ( 3 nacl knopf carlos rojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs non nest ) or ((( 5 methyl complex trait noa ) or ( 3 nacl knopf carlos rojek ))))*.