Talvez deva tentar algumas variações de ortografia:
research systems » research synthesis (Expandir a Pesquisa)
mehta research » meta research (Expandir a Pesquisa), beta research (Expandir a Pesquisa), feta research (Expandir a Pesquisa)
letter nervous » center nervous (Expandir a Pesquisa), lobster nervous (Expandir a Pesquisa), other nervous (Expandir a Pesquisa)
detect nerve » direct nerve (Expandir a Pesquisa), detect neural (Expandir a Pesquisa), detect novel (Expandir a Pesquisa)
systems dan » systems dean (Expandir a Pesquisa), systems das (Expandir a Pesquisa), systems data (Expandir a Pesquisa)
nervous nn » nervous nr (Expandir a Pesquisa), nervous _ (Expandir a Pesquisa), nervous 5 (Expandir a Pesquisa)
j letter » bj letter (Expandir a Pesquisa), cj letter (Expandir a Pesquisa), j letters (Expandir a Pesquisa)
i detect » i detects (Expandir a Pesquisa), _ detect (Expandir a Pesquisa), i defect (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
k mehta » a mehta (Expandir a Pesquisa), _ mehta (Expandir a Pesquisa)
nn dis » en dis (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.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j letter nervous nn dis ) OR ( i detect nerve c dis ))) OR ( k mehta research systems dan ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j letter nervous nn dis ) or ( i detect nerve c dis ))) or ( k mehta research systems dan ))*.