Talvez deva tentar algumas variações de ortografia:
research synthesis » starch synthesis (Expandir a Pesquisa)
mehta research » meta research (Expandir a Pesquisa), media research (Expandir a Pesquisa), beta research (Expandir a Pesquisa)
center service » center services (Expandir a Pesquisa), centered service (Expandir a Pesquisa), centers services (Expandir a Pesquisa)
synthesis de » synthesis dna (Expandir a Pesquisa), synthesis _ (Expandir a Pesquisa), synthesis a (Expandir a Pesquisa)
service can » services can (Expandir a Pesquisa), service chain (Expandir a Pesquisa), service care (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), j centeno (Expandir a Pesquisa), j cestero (Expandir a Pesquisa)
can dis » can disc (Expandir a Pesquisa), van dis (Expandir a Pesquisa), can die (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 dos » e dos (Expandir a Pesquisa), a 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 center service can dis ) OR ( i cent nerve c dos ))) OR ( a mehta research synthesis de ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center service can dis ) or ( i cent nerve c dos ))) or ( a mehta research synthesis de ))*.