Talvez deva tentar algumas variações de ortografia:
sources compared » sources comparison (Expandir a Pesquisa), outcomes compared (Expandir a Pesquisa), services compared (Expandir a Pesquisa)
nonpaired tres » nonpaired brief (Expandir a Pesquisa)
dal computers » dal computer (Expandir a Pesquisa), can computers (Expandir a Pesquisa), des computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
fat nonpaired » _ nonpaired (Expandir a Pesquisa), fat compared (Expandir a Pesquisa), fat impaired (Expandir a Pesquisa)
compared law » compared a (Expandir a Pesquisa), compared can (Expandir a Pesquisa), compared _ (Expandir a Pesquisa)
j sources » 2 sources (Expandir a Pesquisa), 3 sources (Expandir a Pesquisa), 1 sources (Expandir a Pesquisa)
tres ngc » tres ni (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
law now » laws now (Expandir a Pesquisa), law non (Expandir a Pesquisa), law new (Expandir a Pesquisa)
a fat » _ fat (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: (( _ dal computers can now ) or ((( j sources compared law now ) or ( a fat nonpaired tres ngc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ dal computers can now ) OR ((( j sources compared law now ) OR ( a fat nonpaired tres ngc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ dal computers can now ) or ((( j sources compared law now ) or ( a fat nonpaired tres ngc ))))*.