Talvez deva tentar algumas variações de ortografia:
complexity during » complex during (Expandir a Pesquisa), complexes during (Expandir a Pesquisa)
trial complexity » material complexity (Expandir a Pesquisa), social complexity (Expandir a Pesquisa), animal complexity (Expandir a Pesquisa)
nino carlos » cano carlos (Expandir a Pesquisa), bacino carlos (Expandir a Pesquisa), semino carlos (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
nacl nino » nacl nano (Expandir a Pesquisa), nacl kno (Expandir a Pesquisa), nacl mno (Expandir a Pesquisa)
l comps » m comps (Expandir a Pesquisa)
comps u » comps i (Expandir a Pesquisa), comps b (Expandir a Pesquisa), comps m (Expandir a Pesquisa)
5 trial » mm5 trial (Expandir a Pesquisa)
u net » _ net (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l comps u net ) OR ((( 5 trial complexity during g ) OR ( 0.9 nacl nino carlos nava ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps u net ) OR ((( 5 trial complexity during g ) OR ( 0.9 nacl nino carlos nava ))))*.