Talvez deva tentar algumas variações de ortografia:
computer concept » computer concepts (Expandir a Pesquisa), computers concepts (Expandir a Pesquisa), computer content (Expandir a Pesquisa)
coombes john » coombs john (Expandir a Pesquisa), coombes jason (Expandir a Pesquisa), forbes john (Expandir a Pesquisa)
nabr carlos » najar carlos (Expandir a Pesquisa), mar carlos (Expandir a Pesquisa), nassar carlos (Expandir a Pesquisa)
carlos lara » carlos lima (Expandir a Pesquisa), carlos lacerda (Expandir a Pesquisa), carlos lazaro (Expandir a Pesquisa)
m coombes » k coombes (Expandir a Pesquisa), l coomber (Expandir a Pesquisa)
john neil » johns neil (Expandir a Pesquisa), cohn neil (Expandir a Pesquisa), johnson neil (Expandir a Pesquisa)
concept n » concept _ (Expandir a Pesquisa), concept a (Expandir a Pesquisa), concept 2 (Expandir a Pesquisa)
nacl nabr » nacl kbr (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (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 m coombes john neil ) or ((( _ joint computer concept n ) or ( 3 nacl nabr carlos lara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m coombes john neil ) OR ((( _ joint computer concept n ) OR ( 3 nacl nabr carlos lara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m coombes john neil ) or ((( _ joint computer concept n ) or ( 3 nacl nabr carlos lara ))))*.