Talvez deva tentar algumas variações de ortografia:
complaint cases » complaint based (Expandir a Pesquisa), complaints case (Expandir a Pesquisa), complaints caused (Expandir a Pesquisa)
nacl complaint » racial complaint (Expandir a Pesquisa), vocal complaint (Expandir a Pesquisa), a complaint (Expandir a Pesquisa)
less complex » oeis complex (Expandir a Pesquisa), egress complex (Expandir a Pesquisa), hops complex (Expandir a Pesquisa)
complex v » complex via (Expandir a Pesquisa)
cases non » causes non (Expandir a Pesquisa), case non (Expandir a Pesquisa), cases new (Expandir a Pesquisa)
six nw » six new (Expandir a Pesquisa), six nb (Expandir a Pesquisa)
5 less » 35 less (Expandir a Pesquisa), 75 less (Expandir a Pesquisa), b less (Expandir a Pesquisa)
v ngoc » vu ngoc (Expandir a Pesquisa), vo ngoc (Expandir a Pesquisa), _ ngoc (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l (hips OR hits) six nw ) OR ((( 5 less complex v ngoc ) OR ( 3 nacl complaint cases non ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l (hips OR hits) six nw ) or ((( 5 less complex v ngoc ) or ( 3 nacl complaint cases non ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l (hips OR hits) six nw ) or ((( 5 less complex v ngoc ) or ( 3 nacl complaint cases non ))))*.