Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly comparison (Expandir a Pesquisa), elderly care (Expandir a Pesquisa)
snail1 complex » snail complex (Expandir a Pesquisa), snails complex (Expandir a Pesquisa), nail complex (Expandir a Pesquisa)
complex cause » complex causes (Expandir a Pesquisa), complex case (Expandir a Pesquisa), complex care (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
2 elderly » _ elderly (Expandir a Pesquisa), a elderly (Expandir a Pesquisa)
cause new » causes new (Expandir a Pesquisa), use new (Expandir a Pesquisa), cause non (Expandir a Pesquisa)
nat comp » et comp (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
3 snail1 » _ snail1 (Expandir a Pesquisa), a snail1 (Expandir a Pesquisa), 3 snail (Expandir a Pesquisa)
a non » _ non (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: (( _ nat comp can new ) or ((( 2 elderly compared a non ) or ( 3 snail1 complex cause new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ nat comp can new ) OR ((( 2 elderly compared a non ) OR ( 3 snail1 complex cause new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ nat comp can new ) or ((( 2 elderly compared a non ) or ( 3 snail1 complex cause new ))))*.