Talvez deva tentar algumas variações de ortografia:
airways comparison » airway comparison (Expandir a Pesquisa), pathways comparison (Expandir a Pesquisa), assays comparison (Expandir a Pesquisa)
comparison law » comparison low (Expandir a Pesquisa), comparison land (Expandir a Pesquisa), comparison a (Expandir a Pesquisa)
nat computers » what computers (Expandir a Pesquisa), iet computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
rat compare » rat compared (Expandir a Pesquisa), rate compare (Expandir a Pesquisa), rats compare (Expandir a Pesquisa)
j airways » _ airways (Expandir a Pesquisa), jet airways (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
law new » jaw new (Expandir a Pesquisa)
2 nat » 2 nat2 (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), 2 nap (Expandir a Pesquisa)
j rat » j rath (Expandir a Pesquisa), _ rat (Expandir a Pesquisa), a rat (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: (( 2 nat computers can new ) or ((( j airways comparison law new ) or ( j rat compare a new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat computers can new ) OR ((( j airways comparison law new ) OR ( j rat compare a new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat computers can new ) or ((( j airways comparison law new ) or ( j rat compare a new ))))*.