Talvez deva tentar algumas variações de ortografia:
nacl compelling » a compelling (Expandir a Pesquisa), ncds compelling (Expandir a Pesquisa), any compelling (Expandir a Pesquisa)
compelling case » competing causes (Expandir a Pesquisa)
held computers » held computer (Expandir a Pesquisa), handheld computers (Expandir a Pesquisa)
nagy compared » day compared (Expandir a Pesquisa), energy compared (Expandir a Pesquisa), daily compared (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
case non » cause non (Expandir a Pesquisa), case note (Expandir a Pesquisa), use non (Expandir a Pesquisa)
j held » j head (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
a non » _ non (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 held computers a non ) or ((( 3 nacl compelling case non ) or ( a nagy compared a non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j held computers a non ) OR ((( 3 nacl compelling case non ) OR ( a nagy compared a non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j held computers a non ) or ((( 3 nacl compelling case non ) or ( a nagy compared a non ))))*.