Talvez deva tentar algumas variações de ortografia:
carlos roberto » carlos alberto (Expandir a Pesquisa)
complex trans » complex traits (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
hajar carlos » najar carlos (Expandir a Pesquisa), nejar carlos (Expandir a Pesquisa), baltar carlos (Expandir a Pesquisa)
meo complex » mo complex (Expandir a Pesquisa), metro complex (Expandir a Pesquisa), feio complex (Expandir a Pesquisa)
trans ngoc » tran ngoc (Expandir a Pesquisa), trang ngoc (Expandir a Pesquisa), thanh ngoc (Expandir a Pesquisa)
nacl hajar » al hajar (Expandir a Pesquisa), rachel hajar (Expandir a Pesquisa)
j cooper » _ cooper (Expandir a Pesquisa)
jason a » jason _ (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 j cooper jason a ) or ((( 5 meo complex trans ngoc ) or ( 0.9 nacl hajar carlos roberto ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j j cooper jason a ) OR ((( 5 meo complex trans ngoc ) OR ( 0.9 nacl hajar carlos roberto )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j j cooper jason a ) or ((( 5 meo complex trans ngoc ) or ( 0.9 nacl hajar carlos roberto ))))*.