Talvez deva tentar algumas variações de ortografia:
method complex » methods complex (Expandir a Pesquisa), method coupled (Expandir a Pesquisa), method complexity (Expandir a Pesquisa)
complex trips » complex tris (Expandir a Pesquisa), complex traits (Expandir a Pesquisa), complex trial (Expandir a Pesquisa)
nair carlos » jair carlos (Expandir a Pesquisa), naim carlos (Expandir a Pesquisa), vanair carlos (Expandir a Pesquisa)
comps coli » compas colin (Expandir a Pesquisa), comps con (Expandir a Pesquisa)
carlos now » carlos noa (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos novo (Expandir a Pesquisa)
trips ngo » tri ngo (Expandir a Pesquisa), trinh ngo (Expandir a Pesquisa), trips do (Expandir a Pesquisa)
nacl nair » nacl nabr (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa), nacl na (Expandir a Pesquisa)
5 method » 5 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa), 15 method (Expandir a Pesquisa)
l comps » m comps (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 coli new ) OR ((( 5 method complex trips ngo ) OR ( m nacl nair carlos now ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps coli new ) OR ((( 5 method complex trips ngo ) OR ( m nacl nair carlos now ))))*.