Talvez deva tentar algumas variações de ortografia:
comorbidity case » comorbidity based (Expandir a Pesquisa), comorbidity age (Expandir a Pesquisa), comorbidity can (Expandir a Pesquisa)
tool comorbidity » does comorbidity (Expandir a Pesquisa), both comorbidity (Expandir a Pesquisa), do comorbidity (Expandir a Pesquisa)
salt company » holt company (Expandir a Pesquisa), ballet company (Expandir a Pesquisa), health company (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
case note » case notes (Expandir a Pesquisa)
camp can » clamp can (Expandir a Pesquisa), camp ca (Expandir a Pesquisa), amp can (Expandir a Pesquisa)
law netw » law new (Expandir a Pesquisa), law note (Expandir a Pesquisa), law need (Expandir a Pesquisa)
l camp » cl camp (Expandir a Pesquisa), el camp (Expandir a Pesquisa), al camp (Expandir a Pesquisa)
j tool » j topol (Expandir a Pesquisa), j toole (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 l camp can newts ) or ( j tool comorbidity case note ))) or ( j salt company law netw ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j l camp can newts ) OR ( j tool comorbidity case note ))) OR ( j salt company law netw )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j l camp can newts ) or ( j tool comorbidity case note ))) or ( j salt company law netw ))*.