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)
nat compared » fat compared (Expandir a Pesquisa), rat compared (Expandir a Pesquisa), cat compared (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
rath compare » rate compare (Expandir a Pesquisa), rats compare (Expandir a Pesquisa), rats compared (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), phan ngoc (Expandir a Pesquisa)
j airway » _ airway (Expandir a Pesquisa), a airway (Expandir a Pesquisa), 3 airway (Expandir a Pesquisa)
law note » law notes (Expandir a Pesquisa), law noise (Expandir a Pesquisa)
2 nat » 2 nat2 (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), 2 nad (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 compared can ngoc ) or ((( j airway comparison law note ) or ( j rath compare _ new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat compared can ngoc ) OR ((( j airway comparison law note ) OR ( j rath compare _ new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat compared can ngoc ) or ((( j airway comparison law note ) or ( j rath compare _ new ))))*.