Talvez deva tentar algumas variações de ortografia:
methods complex » methods coupled (Expandir a Pesquisa), methods compared (Expandir a Pesquisa), methods computer (Expandir a Pesquisa)
complex than » complex trait (Expandir a Pesquisa)
chan carlos » juan carlos (Expandir a Pesquisa), jean carlos (Expandir a Pesquisa), san carlos (Expandir a Pesquisa)
carlos noe » carlos noel (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa), carlos nojek (Expandir a Pesquisa)
colin new » coli new (Expandir a Pesquisa), colic new (Expandir a Pesquisa), colon new (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
null chan » null cheng (Expandir a Pesquisa), null hrn (Expandir a Pesquisa), null dan (Expandir a Pesquisa)
than ngo » thang ngo (Expandir a Pesquisa), thanh ngo (Expandir a Pesquisa), thuan ngo (Expandir a Pesquisa)
3 null » a null (Expandir a Pesquisa), 1 null (Expandir a Pesquisa), 2 null (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 _ combs colin new ) or ((( 5 methods complex than ngo ) or ( 3 null chan carlos noe ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs colin new ) OR ((( 5 methods complex than ngo ) OR ( 3 null chan carlos noe )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs colin new ) or ((( 5 methods complex than ngo ) or ( 3 null chan carlos noe ))))*.