Talvez deva tentar algumas variações de ortografia:
methods coupled » method coupled (Expandir a Pesquisa), methods compared (Expandir a Pesquisa), methods course (Expandir a Pesquisa)
coupled trinh » coupled ring (Expandir a Pesquisa), coupled thin (Expandir a Pesquisa), coupled twin (Expandir a Pesquisa)
cao carlos » caro carlos (Expandir a Pesquisa), sao carlos (Expandir a Pesquisa), cardo carlos (Expandir a Pesquisa)
carlos noe » carlos noel (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa), carlos nojek (Expandir a Pesquisa)
colin new » coli new (Expandir a Pesquisa), colic new (Expandir a Pesquisa), colon new (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
nacl cao » nacl co (Expandir a Pesquisa), nacl caso4 (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
quoc » quo (Expandir a Pesquisa), quot (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 colin new ) or ((( 5 methods coupled trinh quoc ) or ( 3.5 nacl cao carlos noe ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs colin new ) OR ((( 5 methods coupled trinh quoc ) OR ( 3.5 nacl cao carlos noe )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs colin new ) or ((( 5 methods coupled trinh quoc ) or ( 3.5 nacl cao carlos noe ))))*.