Talvez deva tentar algumas variações de ortografia:
nasal complex » nasal complexa (Expandir a Pesquisa), basal complex (Expandir a Pesquisa), nasalis complex (Expandir a Pesquisa)
complex cell » complex cells (Expandir a Pesquisa), complex case (Expandir a Pesquisa), complex care (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa), nat comm (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can now (Expandir a Pesquisa)
cell now » cells now (Expandir a Pesquisa), cell know (Expandir a Pesquisa), cell non (Expandir a Pesquisa)
2 nat » 2 nat2 (Expandir a Pesquisa), 2 nas (Expandir a Pesquisa), 2 nad (Expandir a Pesquisa)
_ nat » _ net (Expandir a Pesquisa), _ nad (Expandir a Pesquisa), _ nab (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( 2 nat compr can netw ) OR ( _ nat compr can newts ))) OR ( a nasal complex cell now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 2 nat compr can netw ) OR ( _ nat compr can newts ))) OR ( a nasal complex cell now ))*.