Talvez deva tentar algumas variações de ortografia:
central complex » several complex (Expandir a Pesquisa)
complex trex » complex tree (Expandir a Pesquisa), complex tetrex (Expandir a Pesquisa), complex text (Expandir a Pesquisa)
knopf carlos » prof carlos (Expandir a Pesquisa)
carlos yoel » carlos joel (Expandir a Pesquisa), carlos noel (Expandir a Pesquisa), carlos hoelz (Expandir a Pesquisa)
copps john » coppin john (Expandir a Pesquisa), apps john (Expandir a Pesquisa), lopes john (Expandir a Pesquisa)
nacl knopf » nacl kno (Expandir a Pesquisa)
5 central » 15 central (Expandir a Pesquisa), 0375 central (Expandir a Pesquisa), 0625 central (Expandir a Pesquisa)
trex ngoc » trieu ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), tien ngoc (Expandir a Pesquisa)
john noh » john john (Expandir a Pesquisa), john nova (Expandir a Pesquisa), john nash (Expandir a Pesquisa)
l copps » l copp (Expandir a Pesquisa), _ copps (Expandir a Pesquisa), l coppel (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 l copps john noh ) or ((( 5 central complex trex ngoc ) or ( 0.9 nacl knopf carlos yoel ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l copps john noh ) OR ((( 5 central complex trex ngoc ) OR ( 0.9 nacl knopf carlos yoel )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l copps john noh ) or ((( 5 central complex trex ngoc ) or ( 0.9 nacl knopf carlos yoel ))))*.