Talvez deva tentar algumas variações de ortografia:
mental research » dental research (Expandir a Pesquisa), central research (Expandir a Pesquisa), neonatal research (Expandir a Pesquisa)
research system » research systems (Expandir a Pesquisa)
system das » system dias (Expandir a Pesquisa), systems das (Expandir a Pesquisa), system des (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
narvaez c » narvaez j (Expandir a Pesquisa), narvaez _ (Expandir a Pesquisa), narvaez a (Expandir a Pesquisa)
i benito » p benito (Expandir a Pesquisa), a benito (Expandir a Pesquisa), _ benito (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mehta (Expandir a Pesquisa), j mena (Expandir a Pesquisa)
j benet » j bennett (Expandir a Pesquisa), j benito (Expandir a Pesquisa), j benesi (Expandir a Pesquisa)
can die » can diet (Expandir a Pesquisa), van die (Expandir a Pesquisa), aan die (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 benet merve can die ) or ( i benito narvaez c dis ))) or ( j mental research system das ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j benet merve can die ) OR ( i benito narvaez c dis ))) OR ( j mental research system das )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j benet merve can die ) or ( i benito narvaez c dis ))) or ( j mental research system das ))*.