Talvez deva tentar algumas variações de ortografia:
canada comparison » cancer comparison (Expandir a Pesquisa), cancers comparison (Expandir a Pesquisa), data comparison (Expandir a Pesquisa)
comparison a » comparison _ (Expandir a Pesquisa), comparison among (Expandir a Pesquisa), comparison based (Expandir a Pesquisa)
can newly » a newly (Expandir a Pesquisa), can new (Expandir a Pesquisa), men newly (Expandir a Pesquisa)
comer had » comer a (Expandir a Pesquisa), comer al (Expandir a Pesquisa), comer na (Expandir a Pesquisa)
had never » has never (Expandir a Pesquisa), have never (Expandir a Pesquisa), a never (Expandir a Pesquisa)
nail com » nail bomb (Expandir a Pesquisa), nail from (Expandir a Pesquisa), nail can (Expandir a Pesquisa)
j canada » e canada (Expandir a Pesquisa), a canada (Expandir a Pesquisa), c canada (Expandir a Pesquisa)
com can » com cana (Expandir a Pesquisa), com cant (Expandir a Pesquisa), com cal (Expandir a Pesquisa)
l comer » al comer (Expandir a Pesquisa), el comer (Expandir a Pesquisa), all comer (Expandir a Pesquisa)
j nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nail com can newly ) OR ( j l comer had never ))) OR ( j canada comparison a new ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nail com can newly ) or ( j l comer had never ))) or ( j canada comparison a new ))*.