Talvez deva tentar algumas variações de ortografia:
complex stones » complex tones (Expandir a Pesquisa), complex stone (Expandir a Pesquisa), complex histones (Expandir a Pesquisa)
metil complex » metal complex (Expandir a Pesquisa), medial complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa)
ziehl carlos » riehl carlos (Expandir a Pesquisa), diehl carlos (Expandir a Pesquisa), michel carlos (Expandir a Pesquisa)
stones many » stones may (Expandir a Pesquisa), stone many (Expandir a Pesquisa), stones any (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
nacl ziehl » paul ziehl (Expandir a Pesquisa)
john nee » john new (Expandir a Pesquisa), john neena (Expandir a Pesquisa), john neetu (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (Expandir a Pesquisa)
5 metil » 5 methyl (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 l combs john nee ) OR ((( 5 metil complex stones many ) OR ( 0.9 nacl ziehl carlos negrao ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l combs john nee ) OR ((( 5 metil complex stones many ) OR ( 0.9 nacl ziehl carlos negrao ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs john nee ) OR ((( 5 metil complex stones many ) OR ( 0.9 nacl ziehl carlos negrao ))))*.