Talvez deva tentar algumas variações de ortografia:
recurrence serve » recurrence curve (Expandir a Pesquisa), recurrence surge (Expandir a Pesquisa), recurrence observed (Expandir a Pesquisa)
j recurrence » _ recurrence (Expandir a Pesquisa), a recurrence (Expandir a Pesquisa), c recurrence (Expandir a Pesquisa)
cento serve » centro sebrae (Expandir a Pesquisa), cenpf serves (Expandir a Pesquisa)
serve cyst » nerve cyst (Expandir a Pesquisa), nerve cystic (Expandir a Pesquisa)
serve case » nerve case (Expandir a Pesquisa), service case (Expandir a Pesquisa), reserve case (Expandir a Pesquisa)
bent serve » best serve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), stent serve (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa), cyst dna (Expandir a Pesquisa)
case dti » case data (Expandir a Pesquisa), based dti (Expandir a Pesquisa), case due (Expandir a Pesquisa)
i cento » a cento (Expandir a Pesquisa), i censo (Expandir a Pesquisa), i centeno (Expandir a Pesquisa)
serve c » serve _ (Expandir a Pesquisa), serve a (Expandir a Pesquisa), serve w (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)
c disc » c disch (Expandir a Pesquisa), isc disc (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 recurrence serve cyst dis ) OR ( i cento serve case dti ))) OR ( j bent serve c disc ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j recurrence serve cyst dis ) OR ( i cento serve case dti ))) OR ( j bent serve c disc ))*".