Talvez deva tentar algumas variações de ortografia:
research system » research systems (Expandir a Pesquisa)
beta research » meta research (Expandir a Pesquisa), data research (Expandir a Pesquisa), sea research (Expandir a Pesquisa)
absent nerve » bent nerve (Expandir a Pesquisa), abducent nerve (Expandir a Pesquisa), augment nerve (Expandir a Pesquisa)
center nurse » center nurses (Expandir a Pesquisa), better nurse (Expandir a Pesquisa), letter nurse (Expandir a Pesquisa)
nurse can » nurses can (Expandir a Pesquisa), nurse care (Expandir a Pesquisa), nurse case (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), 2 center (Expandir a Pesquisa), 19 center (Expandir a Pesquisa)
l absent » _ absent (Expandir a Pesquisa), 1 absent (Expandir a Pesquisa), 17 absent (Expandir a Pesquisa)
system d » system de (Expandir a Pesquisa), system der (Expandir a Pesquisa), system des (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve co (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa)
k beta » k bera (Expandir a Pesquisa)
c dis » c dias (Expandir a Pesquisa), c disc (Expandir a Pesquisa), c dos (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 center nurse can dis ) or ( l absent nerve c dis ))) or ( k beta research system d ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j center nurse can dis ) OR ( l absent nerve c dis ))) OR ( k beta research system d )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center nurse can dis ) or ( l absent nerve c dis ))) or ( k beta research system d ))*.