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 trial » complex tibial (Expandir a Pesquisa), complex tropical (Expandir a Pesquisa), complex traits (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
05 methods » 5 methods (Expandir a Pesquisa), 05 method (Expandir a Pesquisa), 15 methods (Expandir a Pesquisa)
trial ngoc » trinh ngoc (Expandir a Pesquisa), trial nic (Expandir a Pesquisa), trial noa (Expandir a Pesquisa)
colin net » colin neil (Expandir a Pesquisa), colin n (Expandir a Pesquisa), colin n.a (Expandir a Pesquisa)
3 null » a null (Expandir a Pesquisa), 1 null (Expandir a Pesquisa), 2 null (Expandir a Pesquisa)
null a » null _ (Expandir a Pesquisa), null daf (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 net ) or ((( 05 methods complex trial ngoc ) or ( 3 null a carlos nava ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs colin net ) OR ((( 05 methods complex trial ngoc ) OR ( 3 null a carlos nava )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs colin net ) or ((( 05 methods complex trial ngoc ) or ( 3 null a carlos nava ))))*.