Talvez deva tentar algumas variações de ortografia:
rates compared » diabetes compared (Expandir a Pesquisa)
local computer » novel computer (Expandir a Pesquisa), medical computer (Expandir a Pesquisa)
compared than » compared can (Expandir a Pesquisa), compared three (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
than never » than ever (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
bmj local » bmj global (Expandir a Pesquisa)
da rates » dna rates (Expandir a Pesquisa), da rats (Expandir a Pesquisa), a rates (Expandir a Pesquisa)
case new » cases new (Expandir a Pesquisa), cause new (Expandir a Pesquisa), caste new (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( da rates compared than never ) OR ( j a clamp can new ))) OR ( bmj local computer case new ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( da rates compared than never ) OR ( j a clamp can new ))) OR ( bmj local computer case new ))*.