Talvez deva tentar algumas variações de ortografia:
complex stones » complex tones (Expandir a Pesquisa), complex stone (Expandir a Pesquisa), complex histones (Expandir a Pesquisa)
method complex » methods complex (Expandir a Pesquisa), method coupled (Expandir a Pesquisa), method complexity (Expandir a Pesquisa)
diego carlos » diego campos (Expandir a Pesquisa), dieguez carlos (Expandir a Pesquisa)
stones how » stone how (Expandir a Pesquisa), stones h (Expandir a Pesquisa)
nacl diego » nacl diet (Expandir a Pesquisa)
combs con » combs colin (Expandir a Pesquisa), combs john (Expandir a Pesquisa), combs c (Expandir a Pesquisa)
5 method » 5 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa), 15 method (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (Expandir a Pesquisa), con note (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
negrao » negras (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 con net ) or ((( 5 method complex stones how ) or ( 3 nacl diego carlos negrao ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs con net ) OR ((( 5 method complex stones how ) OR ( 3 nacl diego carlos negrao )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs con net ) or ((( 5 method complex stones how ) or ( 3 nacl diego carlos negrao ))))*.