Talvez deva tentar algumas variações de ortografia:
complex concept » complex concepts (Expandir a Pesquisa), complex context (Expandir a Pesquisa), complex connects (Expandir a Pesquisa)
coombes john » coombs john (Expandir a Pesquisa), coombes jason (Expandir a Pesquisa), forbes john (Expandir a Pesquisa)
fact complex » factor complex (Expandir a Pesquisa), factor complexes (Expandir a Pesquisa), coat complex (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
k coombes » l coomber (Expandir a Pesquisa)
concept n » concept _ (Expandir a Pesquisa), concept a (Expandir a Pesquisa), concept 2 (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
_ fact » _ facts (Expandir a Pesquisa), _ face (Expandir a Pesquisa), _ factor (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 k coombes john n ) or ((( _ fact complex concept n ) or ( 0.9 nacl nano carlos nara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j k coombes john n ) OR ((( _ fact complex concept n ) OR ( 0.9 nacl nano carlos nara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j k coombes john n ) or ((( _ fact complex concept n ) or ( 0.9 nacl nano carlos nara ))))*.