Talvez deva tentar algumas variações de ortografia:
research synthesis » starch synthesis (Expandir a Pesquisa)
meta research » a research (Expandir a Pesquisa), dementia research (Expandir a Pesquisa), methods research (Expandir a Pesquisa)
synthesis dis » synthesis dos (Expandir a Pesquisa), synthesis sis (Expandir a Pesquisa), synthesis dds (Expandir a Pesquisa)
cancer merve » cancer nerve (Expandir a Pesquisa), cancer serves (Expandir a Pesquisa), cancer merece (Expandir a Pesquisa)
cento nerve » bent nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa)
j cancer » j canter (Expandir a Pesquisa), j cantero (Expandir a Pesquisa), j candel (Expandir a Pesquisa)
merve a » merve _ (Expandir a Pesquisa), merve m (Expandir a Pesquisa), merve h (Expandir a Pesquisa)
i cento » a cento (Expandir a Pesquisa), i censo (Expandir a Pesquisa), i centeno (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve co (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa)
j meta » j mehta (Expandir a Pesquisa), j mena (Expandir a Pesquisa), j meca (Expandir a Pesquisa)
a dis » a dos (Expandir a Pesquisa), a des (Expandir a Pesquisa), a dia (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 cancer merve a dis ) OR ( i cento nerve c dis ))) OR ( j meta research synthesis dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cancer merve a dis ) or ( i cento nerve c dis ))) or ( j meta research synthesis dis ))*.