Talvez deva tentar algumas variações de ortografia:
currell survey » current survey (Expandir a Pesquisa), current surveys (Expandir a Pesquisa), cell survey (Expandir a Pesquisa)
direct neural » direct neuronal (Expandir a Pesquisa), direct peroral (Expandir a Pesquisa), direct oral (Expandir a Pesquisa)
neural cause » neural causes (Expandir a Pesquisa), natural cause (Expandir a Pesquisa), neural reuse (Expandir a Pesquisa)
survey les » survey alters (Expandir a Pesquisa)
cause does » causes does (Expandir a Pesquisa), cause des (Expandir a Pesquisa), pause does (Expandir a Pesquisa)
j currell » a hurrell (Expandir a Pesquisa), m burrell (Expandir a Pesquisa), j curiel (Expandir a Pesquisa)
je direct » de direct (Expandir a Pesquisa), e direct (Expandir a Pesquisa), 3e direct (Expandir a Pesquisa)
les due » lines due (Expandir a Pesquisa), alces due (Expandir a Pesquisa), holes due (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: (( j currell survey les due ) or ( je direct neural cause does ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j currell survey les due ) OR ( je direct neural cause does )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j currell survey les due ) or ( je direct neural cause does ))*.