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)
charles negrao » carlos negrao (Expandir a Pesquisa), charles nora (Expandir a Pesquisa), charles neal (Expandir a Pesquisa)
stones how » stone how (Expandir a Pesquisa), stones h (Expandir a Pesquisa)
nacl diehl » nacl diet (Expandir a Pesquisa), marcel diehl (Expandir a Pesquisa)
comps los » comps la (Expandir a Pesquisa)
5 method » 5 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa), 15 method (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
l comps » m comps (Expandir a Pesquisa)
los net » loss net (Expandir a Pesquisa), los neo (Expandir a Pesquisa), los new (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 los net ) or ((( 5 method complex stones how ) or ( 3.5 nacl diehl charles negrao ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comps los net ) OR ((( 5 method complex stones how ) OR ( 3.5 nacl diehl charles negrao )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps los net ) or ((( 5 method complex stones how ) or ( 3.5 nacl diehl charles negrao ))))*.