Talvez deva tentar algumas variações de ortografia:
complex concentrates » complex concentrate (Expandir a Pesquisa)
concentrates a » concentrates _ (Expandir a Pesquisa), concentrations a (Expandir a Pesquisa), concentrates from (Expandir a Pesquisa)
facts complex » fact complex (Expandir a Pesquisa), factors complex (Expandir a Pesquisa), factor complex (Expandir a Pesquisa)
coombes john » coombs john (Expandir a Pesquisa), coombes jason (Expandir a Pesquisa), forbes john (Expandir a Pesquisa)
carlos lara » carlos lima (Expandir a Pesquisa), carlos lazaro (Expandir a Pesquisa), carlos lessa (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
_ facts » _ faces (Expandir a Pesquisa), _ factors (Expandir a Pesquisa), _ factor (Expandir a Pesquisa)
nacl a » nacl _ (Expandir a Pesquisa), nacl e (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ coombes john n ) OR ((( _ facts complex concentrates a ) OR ( 7.5 nacl a carlos lara ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ coombes john n ) or ((( _ facts complex concentrates a ) or ( 7.5 nacl a carlos lara ))))*.