Talvez deva tentar algumas variações de ortografia:
medical reserve » medical research (Expandir a Pesquisa), medical resource (Expandir a Pesquisa), medical referees (Expandir a Pesquisa)
reserve system » research system (Expandir a Pesquisa), nerve system (Expandir a Pesquisa), research systems (Expandir a Pesquisa)
cent serve » stent serve (Expandir a Pesquisa), best serve (Expandir a Pesquisa), pet serve (Expandir a Pesquisa)
beta serve » beta served (Expandir a Pesquisa), beta nerve (Expandir a Pesquisa), beta3 serves (Expandir a Pesquisa)
system dcs » system dcus (Expandir a Pesquisa), system sdcs (Expandir a Pesquisa), system des (Expandir a Pesquisa)
serve _an » serve many (Expandir a Pesquisa), serve a (Expandir a Pesquisa)
j medical » j medina (Expandir a Pesquisa), hajj medical (Expandir a Pesquisa)
_an dcs » can dcs (Expandir a Pesquisa), than dcs (Expandir a Pesquisa)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa), j center (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 cent serve _an dcs ) OR ( i beta serve _ dis ))) OR ( j medical reserve system dcs ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cent serve _an dcs ) or ( i beta serve _ dis ))) or ( j medical reserve system dcs ))*.