Talvez deva tentar algumas variações de ortografia:
swards compared » swabs compared (Expandir a Pesquisa), ward compared (Expandir a Pesquisa), aids compared (Expandir a Pesquisa)
cholera caused » cholera cases (Expandir a Pesquisa)
soy compared » boy compared (Expandir a Pesquisa), body compared (Expandir a Pesquisa), copy compared (Expandir a Pesquisa)
caused netw » caused death (Expandir a Pesquisa), caused fetal (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
a cholera » _ cholera (Expandir a Pesquisa)
a norreys » a norris (Expandir a Pesquisa), a nortes (Expandir a Pesquisa)
_ swards » _ swarms (Expandir a Pesquisa), _ swords (Expandir a Pesquisa), _ sward (Expandir a Pesquisa)
j soy » _ soy (Expandir a Pesquisa), a soy (Expandir a Pesquisa), d soy (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (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 a cholera caused netw ) OR ((( j soy compared a norreys ) OR ( _ swards compared a now ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j a cholera caused netw ) OR ((( j soy compared a norreys ) OR ( _ swards compared a now ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j a cholera caused netw ) OR ((( j soy compared a norreys ) OR ( _ swards compared a now ))))*.