Talvez deva tentar algumas variações de ortografia:
nail popperiana » nao popperiano (Expandir a Pesquisa)
snairs complex » snails complex (Expandir a Pesquisa), snare complex (Expandir a Pesquisa), scars complex (Expandir a Pesquisa)
popperiana car » popperiana da (Expandir a Pesquisa), popperiana a (Expandir a Pesquisa), popperiano para (Expandir a Pesquisa)
complex cases » complex causes (Expandir a Pesquisa), complex case (Expandir a Pesquisa), complex care (Expandir a Pesquisa)
comper can » computer can (Expandir a Pesquisa), complex can (Expandir a Pesquisa), comp can (Expandir a Pesquisa)
cases now » cases new (Expandir a Pesquisa), cases non (Expandir a Pesquisa), case now (Expandir a Pesquisa)
l comper » l compere (Expandir a Pesquisa), l cooper (Expandir a Pesquisa), c comper (Expandir a Pesquisa)
5 snairs » _ snails (Expandir a Pesquisa), 5 snare (Expandir a Pesquisa)
car non » ear non (Expandir a Pesquisa), war non (Expandir a Pesquisa), clear non (Expandir a Pesquisa)
3 nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nacl (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: (( j l comper can new ) OR ((( 5 snairs complex cases now ) OR ( 3 nail popperiana car non ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l comper can new ) OR ((( 5 snairs complex cases now ) OR ( 3 nail popperiana car non ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comper can new ) OR ((( 5 snairs complex cases now ) OR ( 3 nail popperiana car non ))))*.