Talvez deva tentar algumas variações de ortografia:
survey canada » survey canadians (Expandir a Pesquisa), survey ramadan (Expandir a Pesquisa), survey pada (Expandir a Pesquisa)
open survey » open surgery (Expandir a Pesquisa), japan survey (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
10 seventh » _ seventh (Expandir a Pesquisa), a seventh (Expandir a Pesquisa)
canada dis » canada dits (Expandir a Pesquisa), canada des (Expandir a Pesquisa), canada does (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case did (Expandir a Pesquisa), case di (Expandir a Pesquisa)
erj open » bmj open (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat bias (Expandir a Pesquisa)
i cent » i cento (Expandir a Pesquisa), ai cent (Expandir a Pesquisa), ii cent (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: (( i cent nerve case dis ) or ((( 10 seventh nerve cat dis ) or ( erj open survey canada dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( i cent nerve case dis ) OR ((( 10 seventh nerve cat dis ) OR ( erj open survey canada dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( i cent nerve case dis ) or ((( 10 seventh nerve cat dis ) or ( erj open survey canada dis ))))*.