Talvez deva tentar algumas variações de ortografia:
carbon complex » carbonyl complex (Expandir a Pesquisa), carbon complexes (Expandir a Pesquisa), carbene complex (Expandir a Pesquisa)
carlos zavala » carlos ayala (Expandir a Pesquisa), carlos zapata (Expandir a Pesquisa), cortes zavala (Expandir a Pesquisa)
complex text » complete text (Expandir a Pesquisa), complex tear (Expandir a Pesquisa), complex context (Expandir a Pesquisa)
nina carlos » nino carlos (Expandir a Pesquisa), pina carlos (Expandir a Pesquisa), nin carlos (Expandir a Pesquisa)
combs coli » combs colin (Expandir a Pesquisa), combe colin (Expandir a Pesquisa), combs cody (Expandir a Pesquisa)
nacl nina » nacl nano (Expandir a Pesquisa), nacl na (Expandir a Pesquisa)
5 carbon » 1 carbon (Expandir a Pesquisa), 5 carboxy (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
text n » text _ (Expandir a Pesquisa), text a (Expandir a Pesquisa), text 8 (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 e combs coli new ) or ((( 5 carbon complex text n ) or ( 7.5 nacl nina carlos zavala ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e combs coli new ) OR ((( 5 carbon complex text n ) OR ( 7.5 nacl nina carlos zavala )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs coli new ) or ((( 5 carbon complex text n ) or ( 7.5 nacl nina carlos zavala ))))*.