Talvez deva tentar algumas variações de ortografia:
methods complex » methods coupled (Expandir a Pesquisa), methods compared (Expandir a Pesquisa), methods computer (Expandir a Pesquisa)
complex stones » complex tones (Expandir a Pesquisa), complex stone (Expandir a Pesquisa), complex histones (Expandir a Pesquisa)
charles negrao » carlos negrao (Expandir a Pesquisa), charles nora (Expandir a Pesquisa), charles neal (Expandir a Pesquisa)
stones can » stones case (Expandir a Pesquisa), stones a (Expandir a Pesquisa), stones may (Expandir a Pesquisa)
nacl diehl » nacl diet (Expandir a Pesquisa), marcel diehl (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
l comps » m comps (Expandir a Pesquisa)
comps c » camps c (Expandir a Pesquisa), comps i (Expandir a Pesquisa), comps b (Expandir a Pesquisa)
c note » c notes (Expandir a Pesquisa), a note (Expandir a Pesquisa), _ note (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (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 l comps c note ) or ((( 5 methods complex stones can ) or ( 3 nacl diehl charles negrao ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comps c note ) OR ((( 5 methods complex stones can ) OR ( 3 nacl diehl charles negrao )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps c note ) or ((( 5 methods complex stones can ) or ( 3 nacl diehl charles negrao ))))*.