Talvez deva tentar algumas variações de ortografia:
methods comparison » method comparison (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
trial ngoc » trinh ngoc (Expandir a Pesquisa), trial nic (Expandir a Pesquisa), trial noa (Expandir a Pesquisa)
gil carlos » gil campos (Expandir a Pesquisa)
combs con » combs colin (Expandir a Pesquisa), combs john (Expandir a Pesquisa), combs c (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
nacl gil » nacl kcl (Expandir a Pesquisa), nacl gum (Expandir a Pesquisa), nacl i (Expandir a Pesquisa)
m combs » m coombs (Expandir a Pesquisa), e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (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 combs con net ) or ((( 5 methods comparison trial ngoc ) or ( 0.9 nacl gil carlos nara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m combs con net ) OR ((( 5 methods comparison trial ngoc ) OR ( 0.9 nacl gil carlos nara ))))*.