Talvez deva tentar algumas variações de ortografia:
method complex » methods complex (Expandir a Pesquisa), method coupled (Expandir a Pesquisa), method complexity (Expandir a Pesquisa)
species ngo » species new (Expandir a Pesquisa), species non (Expandir a Pesquisa), species n (Expandir a Pesquisa)
nabr carlos » najar carlos (Expandir a Pesquisa), nader carlos (Expandir a Pesquisa), mar carlos (Expandir a Pesquisa)
carlos nada » carlos nadaf (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos nara (Expandir a Pesquisa)
comas upon » cones upon (Expandir a Pesquisa), domains upon (Expandir a Pesquisa), corneas upon (Expandir a Pesquisa)
15 method » 135 method (Expandir a Pesquisa), 15 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa)
nacl nabr » nacl kbr (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
upon net » upon neo (Expandir a Pesquisa), upon new (Expandir a Pesquisa), upon near (Expandir a Pesquisa)
l comas » l comps (Expandir a Pesquisa), l comeau (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 l comas upon net ) or ((( 15 method complex species ngo ) or ( _ nacl nabr carlos nada ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comas upon net ) OR ((( 15 method complex species ngo ) OR ( _ nacl nabr carlos nada )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comas upon net ) or ((( 15 method complex species ngo ) or ( _ nacl nabr carlos nada ))))*.