Talvez deva tentar algumas variações de ortografia:
research synthesis » starch synthesis (Expandir a Pesquisa)
mental research » dental research (Expandir a Pesquisa), central research (Expandir a Pesquisa), neonatal research (Expandir a Pesquisa)
center nerve » cancer nerve (Expandir a Pesquisa), center nurse (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
synthesis di » synthesis did (Expandir a Pesquisa), synthesis de (Expandir a Pesquisa), synthesis dna (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
nerve vas » nerve a (Expandir a Pesquisa), nerve vi (Expandir a Pesquisa), nerve vii (Expandir a Pesquisa)
3 center » _ center (Expandir a Pesquisa), a center (Expandir a Pesquisa), 2 center (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mena (Expandir a Pesquisa), j mehta (Expandir a Pesquisa)
vas dis » vas dias (Expandir a Pesquisa), vasc dis (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
i cent » i cento (Expandir a Pesquisa), ai cent (Expandir a Pesquisa), ii cent (Expandir a Pesquisa)
c dias » c diaz (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: (((( 3 center nerve vas dis ) or ( i cent nerve c dias ))) or ( j mental research synthesis di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 3 center nerve vas dis ) OR ( i cent nerve c dias ))) OR ( j mental research synthesis di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 3 center nerve vas dis ) or ( i cent nerve c dias ))) or ( j mental research synthesis di ))*.