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)
rats compare » rats compared (Expandir a Pesquisa), rate compare (Expandir a Pesquisa), rates compared (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa)
phan ngoc » pham ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), van ngoc (Expandir a Pesquisa)
3 airways » _ airways (Expandir a Pesquisa), 3 airway (Expandir a Pesquisa)
law new » jaw new (Expandir a Pesquisa)
j rats » j rath (Expandir a Pesquisa), j raes (Expandir a Pesquisa), rij rats (Expandir a Pesquisa)
2 nat » 2 nat2 (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), 2 nap (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 compr phan ngoc ) or ((( 3 airways comparison law new ) or ( j rats compare _ new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat compr phan ngoc ) OR ((( 3 airways comparison law new ) OR ( j rats compare _ new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat compr phan ngoc ) or ((( 3 airways comparison law new ) or ( j rats compare _ new ))))*.