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 thien » complex thin (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex three (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
sao carlos » joao carlos (Expandir a Pesquisa)
comps con » compost con (Expandir a Pesquisa), comps los (Expandir a Pesquisa)
15 method » 135 method (Expandir a Pesquisa), 15 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa)
thien ngo » thien ngoc (Expandir a Pesquisa), thien nga (Expandir a Pesquisa), tien ngo (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl sao » nacl salt (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa), nacl naoh (Expandir a Pesquisa)
con nee » con net (Expandir a Pesquisa), con noe (Expandir a Pesquisa), con note (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 comps con nee ) OR ((( 15 method complex thien ngo ) OR ( 7.5 nacl sao carlos nara ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j m comps con nee ) OR ((( 15 method complex thien ngo ) OR ( 7.5 nacl sao carlos nara ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m comps con nee ) OR ((( 15 method complex thien ngo ) OR ( 7.5 nacl sao carlos nara ))))*.