Talvez deva tentar algumas variações de ortografia:
airway comparison » assay comparison (Expandir a Pesquisa), way comparison (Expandir a Pesquisa), pairwise comparison (Expandir a Pesquisa)
comparison law » comparison low (Expandir a Pesquisa), comparison land (Expandir a Pesquisa), comparison a (Expandir a Pesquisa)
rate compare » rate compared (Expandir a Pesquisa), rates compared (Expandir a Pesquisa), hydrate compare (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
j airway » b airway (Expandir a Pesquisa), cf airway (Expandir a Pesquisa)
law netw » law new (Expandir a Pesquisa), law note (Expandir a Pesquisa), law need (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j rate » j rane (Expandir a Pesquisa), j race (Expandir a Pesquisa), j rath (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: (( _ nat compr can now ) or ((( j airway comparison law netw ) or ( j rate compare _ new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ nat compr can now ) OR ((( j airway comparison law netw ) OR ( j rate compare _ new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ nat compr can now ) or ((( j airway comparison law netw ) or ( j rate compare _ new ))))*.