Talvez deva tentar algumas variações de ortografia:
complex trait » complex traits (Expandir a Pesquisa)
company cause » company case (Expandir a Pesquisa), company cars (Expandir a Pesquisa), company accused (Expandir a Pesquisa)
glp complex » pulp complex (Expandir a Pesquisa), garp complex (Expandir a Pesquisa), p complex (Expandir a Pesquisa)
oil company » oil companies (Expandir a Pesquisa)
romer dan » romer a (Expandir a Pesquisa), romer daniel (Expandir a Pesquisa)
trait non » traits non (Expandir a Pesquisa), trail non (Expandir a Pesquisa), train non (Expandir a Pesquisa)
cause non » causes non (Expandir a Pesquisa)
al romer » al romero (Expandir a Pesquisa), paul romer (Expandir a Pesquisa), axel romer (Expandir a Pesquisa)
dan net » dan neal (Expandir a Pesquisa)
a glp » _ glp (Expandir a Pesquisa), a gap (Expandir a Pesquisa), 1 glp (Expandir a Pesquisa)
j al » j a (Expandir a Pesquisa), j l (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: (( j al romer dan net ) or ((( a glp complex trait non ) or ( _ oil company cause non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j al romer dan net ) OR ((( a glp complex trait non ) OR ( _ oil company cause non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j al romer dan net ) or ((( a glp complex trait non ) or ( _ oil company cause non ))))*.