Talvez deva tentar algumas variações de ortografia:
marcos roberto » carlos roberto (Expandir a Pesquisa)
coupled trans » couples trans (Expandir a Pesquisa), coupled strand (Expandir a Pesquisa), coupled traits (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
najar marcos » najar carlos (Expandir a Pesquisa), gaspar marcos (Expandir a Pesquisa), maynar marcos (Expandir a Pesquisa)
trans ngoc » tran ngoc (Expandir a Pesquisa), trang ngoc (Expandir a Pesquisa), thanh ngoc (Expandir a Pesquisa)
al najar » al najjar (Expandir a Pesquisa), al naggar (Expandir a Pesquisa), al nacer (Expandir a Pesquisa)
jason a » jason _ (Expandir a Pesquisa)
3.5 al » 3.5 a (Expandir a Pesquisa), 0.5 al (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
5 two » _ two (Expandir a Pesquisa), a two (Expandir a Pesquisa), b two (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 _ cooper jason a ) or ((( 5 two coupled trans ngoc ) or ( 3.5 al najar marcos roberto ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ cooper jason a ) OR ((( 5 two coupled trans ngoc ) OR ( 3.5 al najar marcos roberto )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ cooper jason a ) or ((( 5 two coupled trans ngoc ) or ( 3.5 al najar marcos roberto ))))*.