Talvez deva tentar algumas variações de ortografia:
methods compared » method compared (Expandir a Pesquisa), methods comparison (Expandir a Pesquisa)
compared using » companies using (Expandir a Pesquisa), prepared using (Expandir a Pesquisa), comparison using (Expandir a Pesquisa)
charles nora » charles n (Expandir a Pesquisa)
using naclo » using nacl (Expandir a Pesquisa), using nano (Expandir a Pesquisa), using nail (Expandir a Pesquisa)
lu charles » chiu charles (Expandir a Pesquisa)
combs dan » combs jan (Expandir a Pesquisa), combs juan (Expandir a Pesquisa), combs ryan (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
dan net » dan neal (Expandir a Pesquisa)
0.98 ma » 0.78 ma (Expandir a Pesquisa), 0.8 ma (Expandir a Pesquisa), 0.98 a (Expandir a Pesquisa)
ma lu » ma li (Expandir a Pesquisa), ma yu (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 dan net ) or ((( 5 methods compared using naclo ) or ( 0.98 ma lu charles nora ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs dan net ) OR ((( 5 methods compared using naclo ) OR ( 0.98 ma lu charles nora )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs dan net ) or ((( 5 methods compared using naclo ) or ( 0.98 ma lu charles nora ))))*.