Talvez deva tentar algumas variações de ortografia:
norway comparison » airway comparison (Expandir a Pesquisa), way comparison (Expandir a Pesquisa), pathway comparison (Expandir a Pesquisa)
rates compared » diabetes compared (Expandir a Pesquisa)
comparison a » comparison _ (Expandir a Pesquisa), comparison among (Expandir a Pesquisa), comparison based (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
natal com » natural com (Expandir a Pesquisa), natal ao (Expandir a Pesquisa)
a norway » _ norway (Expandir a Pesquisa)
2 natal » 2 natural (Expandir a Pesquisa)
com can » com cana (Expandir a Pesquisa), com cant (Expandir a Pesquisa), com cal (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j rates » j raes (Expandir a Pesquisa), j ramesh (Expandir a Pesquisa), j rajesh (Expandir a Pesquisa)
note » none (Expandir a Pesquisa), node (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 natal com can now ) or ((( a norway comparison a note ) or ( j rates compared a new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 natal com can now ) OR ((( a norway comparison a note ) OR ( j rates compared a new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 natal com can now ) or ((( a norway comparison a note ) or ( j rates compared a new ))))*.