Talvez deva tentar algumas variações de ortografia:
research systems » research synthesis (Expandir a Pesquisa)
dental research » medical research (Expandir a Pesquisa)
nerve phase » nerve case (Expandir a Pesquisa), nerve has (Expandir a Pesquisa), nerve plane (Expandir a Pesquisa)
phase diets » phase does (Expandir a Pesquisa), whose diets (Expandir a Pesquisa), phase disease (Expandir a Pesquisa)
systems dis » systems disk (Expandir a Pesquisa), systems tdis (Expandir a Pesquisa), systems dss (Expandir a Pesquisa)
cena nerve » renal nerve (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
j dental » j delta (Expandir a Pesquisa), j dent (Expandir a Pesquisa), j deal (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
a cena » na cena (Expandir a Pesquisa)
i cent » i cento (Expandir a Pesquisa), ai cent (Expandir a Pesquisa), ii cent (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.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a cena nerve phase diets ) OR ( i cent nerve a dis ))) OR ( j dental research systems dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a cena nerve phase diets ) or ( i cent nerve a dis ))) or ( j dental research systems dis ))*.