Talvez deva tentar algumas variações de ortografia:
method compared » method combined (Expandir a Pesquisa), method comparison (Expandir a Pesquisa)
compared using » companies using (Expandir a Pesquisa), prepared using (Expandir a Pesquisa), comparison using (Expandir a Pesquisa)
mario carlos » mario carlo (Expandir a Pesquisa), rio carlos (Expandir a Pesquisa), julio carlos (Expandir a Pesquisa)
carlos juca » carlos juan (Expandir a Pesquisa), carlos julio (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), combes john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa)
using ngoc » using ngs (Expandir a Pesquisa), sang ngoc (Expandir a Pesquisa), using nacc (Expandir a Pesquisa)
john net » john new (Expandir a Pesquisa), john neetu (Expandir a Pesquisa), john asnet (Expandir a Pesquisa)
5 method » 5 methods (Expandir a Pesquisa), 5 methoxy (Expandir a Pesquisa), 5 methyl (Expandir a Pesquisa)
0.9 nacl » 3.5 nacl (Expandir a Pesquisa)
m combs » m coombs (Expandir a Pesquisa), e combs (Expandir a Pesquisa), _ combs (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 john net ) or ((( 5 method compared using ngoc ) or ( 0.9 nacl mario carlos juca ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m combs john net ) OR ((( 5 method compared using ngoc ) OR ( 0.9 nacl mario carlos juca )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m combs john net ) or ((( 5 method compared using ngoc ) or ( 0.9 nacl mario carlos juca ))))*.