Talvez deva tentar algumas variações de ortografia:
norway comrarative » norway comparative (Expandir a Pesquisa), norway collaborative (Expandir a Pesquisa), away comparative (Expandir a Pesquisa)
agents compared » stents compared (Expandir a Pesquisa), events compared (Expandir a Pesquisa), patients compared (Expandir a Pesquisa)
comrarative a » comparative a (Expandir a Pesquisa), comparative ab (Expandir a Pesquisa), comparative al (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
j norway » _ norway (Expandir a Pesquisa), a norway (Expandir a Pesquisa), 1 norway (Expandir a Pesquisa)
4 agents » 4 ages (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
a non » _ non (Expandir a Pesquisa)
a net » _ net (Expandir a Pesquisa), u net (Expandir a Pesquisa), a neo (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: (( 2 nat2 clamp a non ) or ((( j norway comrarative a net ) or ( 4 agents compared a new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat2 clamp a non ) OR ((( j norway comrarative a net ) OR ( 4 agents compared a new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat2 clamp a non ) or ((( j norway comrarative a net ) or ( 4 agents compared a new ))))*.