Talvez deva tentar algumas variações de ortografia:
norwalk comparing » norway comparing (Expandir a Pesquisa), work comparing (Expandir a Pesquisa), norms comparing (Expandir a Pesquisa)
comparing local » combining local (Expandir a Pesquisa), comparing low (Expandir a Pesquisa), comparing clinical (Expandir a Pesquisa)
rats compared » rates compared (Expandir a Pesquisa)
chimp phan » chimp can (Expandir a Pesquisa)
phan ngoc » pham ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), van ngoc (Expandir a Pesquisa)
a norwalk » _ norwalk (Expandir a Pesquisa), a normal (Expandir a Pesquisa)
local new » local news (Expandir a Pesquisa), local need (Expandir a Pesquisa), local na (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 chimp phan ngoc ) or ((( a norwalk comparing local new ) or ( j rats compared _ new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat chimp phan ngoc ) OR ((( a norwalk comparing local new ) OR ( j rats compared _ new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat chimp phan ngoc ) or ((( a norwalk comparing local new ) or ( j rats compared _ new ))))*.