Talvez deva tentar algumas variações de ortografia:
optimal method » optical method (Expandir a Pesquisa), optical methods (Expandir a Pesquisa), optimized method (Expandir a Pesquisa)
analog methods » analogy method (Expandir a Pesquisa), analysis methods (Expandir a Pesquisa), analytic methods (Expandir a Pesquisa)
anal methods » anal method (Expandir a Pesquisa), manual methods (Expandir a Pesquisa), dual methods (Expandir a Pesquisa)
methods real » methods reveal (Expandir a Pesquisa), methods reveals (Expandir a Pesquisa), methods realist (Expandir a Pesquisa)
method cream » methods cream (Expandir a Pesquisa), method preamp (Expandir a Pesquisa), method breeam (Expandir a Pesquisa)
methods cam » methods can (Expandir a Pesquisa), method cam (Expandir a Pesquisa), methods cad (Expandir a Pesquisa)
_ optimal » _ optical (Expandir a Pesquisa)
j analog » _ analog (Expandir a Pesquisa), 1 analog (Expandir a Pesquisa), a analog (Expandir a Pesquisa)
j anal » j anil (Expandir a Pesquisa), j anibal (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 analog methods cam ) or ( j anal methods real ))) or ( _ optimal method cream ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j analog methods cam ) OR ( j anal methods real ))) OR ( _ optimal method cream )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j analog methods cam ) or ( j anal methods real ))) or ( _ optimal method cream ))*.