Talvez deva tentar algumas variações de ortografia:
severity compared » diversity compared (Expandir a Pesquisa), obesity compared (Expandir a Pesquisa), safety compared (Expandir a Pesquisa)
rats compared » rates compared (Expandir a Pesquisa)
fat compare » fat compared (Expandir a Pesquisa), rat compared (Expandir a Pesquisa), cat compared (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
n severity » a severity (Expandir a Pesquisa), 5 severity (Expandir a Pesquisa), 1 severity (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
j rats » j rath (Expandir a Pesquisa), j raes (Expandir a Pesquisa), rij rats (Expandir a Pesquisa)
a netw » a neto (Expandir a Pesquisa), a neta (Expandir a Pesquisa), a netb (Expandir a Pesquisa)
a now » a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa), a nos (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: (( _ fat compare a now ) or ((( j rats compared a netw ) or ( n severity compared a new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ fat compare a now ) OR ((( j rats compared a netw ) OR ( n severity compared a new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ fat compare a now ) or ((( j rats compared a netw ) or ( n severity compared a new ))))*.