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)
centner nerve » central nerve (Expandir a Pesquisa), cancer nerve (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
systems dan » systems dean (Expandir a Pesquisa), systems das (Expandir a Pesquisa), systems data (Expandir a Pesquisa)
j centner » j center (Expandir a Pesquisa), m centner (Expandir a Pesquisa), _ entner (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa)
can nerve » can serve (Expandir a Pesquisa), canal nerve (Expandir a Pesquisa), pain nerve (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat bias (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve co (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa)
k mehta » a mehta (Expandir a Pesquisa), _ mehta (Expandir a Pesquisa)
i can » _ can (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 centner nerve cat dis ) or ( i can nerve c dis ))) or ( k mehta research systems dan ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j centner nerve cat dis ) OR ( i can nerve c dis ))) OR ( k mehta research systems dan )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j centner nerve cat dis ) or ( i can nerve c dis ))) or ( k mehta research systems dan ))*.