Talvez deva tentar algumas variações de ortografia:
complex trans » complex traits (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
nair complex » pair complex (Expandir a Pesquisa), nail complex (Expandir a Pesquisa), sir complex (Expandir a Pesquisa)
natl company » nail company (Expandir a Pesquisa), rail company (Expandir a Pesquisa), small company (Expandir a Pesquisa)
company cpr » company car (Expandir a Pesquisa), company cars (Expandir a Pesquisa), company bor (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
cpr now » apmr now (Expandir a Pesquisa)
l comp » l comps (Expandir a Pesquisa), l como (Expandir a Pesquisa), l comper (Expandir a Pesquisa)
5 nair » _ nair (Expandir a Pesquisa), g nair (Expandir a Pesquisa), p nair (Expandir a Pesquisa)
3 natl » 3 nacl (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa), _ natl (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 comp can new ) OR ((( 5 nair complex trans (ngoc OR ngo) ) OR ( 3 natl company cpr now ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l comp can new ) or ((( 5 nair complex trans (ngoc OR ngo) ) or ( 3 natl company cpr now ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comp can new ) or ((( 5 nair complex trans (ngoc OR ngo) ) or ( 3 natl company cpr now ))))*.