Talvez deva tentar algumas variações de ortografia:
hegarty compared » severity compared (Expandir a Pesquisa), density compared (Expandir a Pesquisa), entity compared (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 hegarty » n hegarty (Expandir a Pesquisa), a hegarty (Expandir a Pesquisa), c hegarty (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa)
fat amp » fat camp (Expandir a Pesquisa), mat amp (Expandir a Pesquisa), rat amp (Expandir a Pesquisa)
amp cam » amp camp (Expandir a Pesquisa), amp can (Expandir a Pesquisa), amp ca (Expandir a Pesquisa)
cam now » am now (Expandir a Pesquisa), alam now (Expandir a Pesquisa), cam ngoc (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 compr can non ) or ( _ fat amp cam now ))) or ( j hegarty compared _ netw ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 2 nat compr can non ) OR ( _ fat amp cam now ))) OR ( j hegarty compared _ netw ))*.