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)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
cena nerve » renal nerve (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
systems di » systems doi (Expandir a Pesquisa), systems do (Expandir a Pesquisa), systems de (Expandir a Pesquisa)
nerve aat » nerve 3t (Expandir a Pesquisa), nerve aen (Expandir a Pesquisa), nerve age (Expandir a Pesquisa)
aat diet » fat diet (Expandir a Pesquisa), eat diet (Expandir a Pesquisa), rat diet (Expandir a Pesquisa)
i mental » vi mental (Expandir a Pesquisa), ii mental (Expandir a Pesquisa), i metal (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j mehta » a mehta (Expandir a Pesquisa), _ mehta (Expandir a Pesquisa), k mehta (Expandir a Pesquisa)
a cena » na cena (Expandir a Pesquisa)
a dis » a dos (Expandir a Pesquisa), a des (Expandir a Pesquisa), a dia (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: (((( a cena nerve aat diet ) or ( i mental nerve a dis ))) or ( j mehta research systems di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a cena nerve aat diet ) OR ( i mental nerve a dis ))) OR ( j mehta research systems di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a cena nerve aat diet ) or ( i mental nerve a dis ))) or ( j mehta research systems di ))*.