Talvez deva tentar algumas variações de ortografia:
complex trait » complex traits (Expandir a Pesquisa)
caso4 carlos » caso carlos (Expandir a Pesquisa), caro carlos (Expandir a Pesquisa), casal carlos (Expandir a Pesquisa)
carlos joel » carlson joel (Expandir a Pesquisa), carlos jose (Expandir a Pesquisa), carlos joao (Expandir a Pesquisa)
comps john » copps john (Expandir a Pesquisa), combs john (Expandir a Pesquisa), camps johan (Expandir a Pesquisa)
trait ngoc » tran ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa), trang ngoc (Expandir a Pesquisa)
nacl caso4 » nacl na2so4 (Expandir a Pesquisa)
5 several » _ several (Expandir a Pesquisa), a several (Expandir a Pesquisa), al several (Expandir a Pesquisa)
john noh » john john (Expandir a Pesquisa), john nova (Expandir a Pesquisa), john nash (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (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": "(( j m comps john noh ) OR ((( 5 several complex trait ngoc ) OR ( 3.5 nacl caso4 carlos joel ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m comps john noh ) OR ((( 5 several complex trait ngoc ) OR ( 3.5 nacl caso4 carlos joel ))))*.