Perhaps you should try some spelling variations:
norway comparison » airway comparison (Expand Search), way comparison (Expand Search), germany comparison (Expand Search)
comparison a » comparison _ (Expand Search), comparison among (Expand Search), comparison based (Expand Search)
rat compare » rat compared (Expand Search), rate compare (Expand Search), rats compare (Expand Search)
compare a » compare _ (Expand Search)
nap comp » nap core (Expand Search)
comp can » camp can (Expand Search), chimp can (Expand Search), clamp can (Expand Search)
a norway » _ norway (Expand Search)
can now » can non (Expand Search), can new (Expand Search), can ngoc (Expand Search)
2 nap » _ nap (Expand Search), a nap (Expand Search), i nap (Expand Search)
j rat » j rath (Expand Search), _ rat (Expand Search), a rat (Expand Search)
note » none (Expand Search), node (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( 2 nap comp can now ) or ((( a norway comparison a note ) or ( j rat compare a new ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( 2 nap comp can now ) OR ((( a norway comparison a note ) OR ( j rat compare a new )))).
• Adding a wildcard symbol may retrieve word variants: (( 2 nap comp can now ) or ((( a norway comparison a note ) or ( j rat compare a new ))))*.