Talvez deva tentar algumas variações de ortografia:
methods comparison » method comparison (Expandir a Pesquisa)
comparison tried » comparison trial (Expandir a Pesquisa), comparison tree (Expandir a Pesquisa), comparison travel (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
tried ngoc » trieu ngoc (Expandir a Pesquisa), trinh ngoc (Expandir a Pesquisa), tien ngoc (Expandir a Pesquisa)
daf carlos » f carlos (Expandir a Pesquisa), tcf carlos (Expandir a Pesquisa), maluf carlos (Expandir a Pesquisa)
combs con » combs colin (Expandir a Pesquisa), combs john (Expandir a Pesquisa), combs cody (Expandir a Pesquisa)
5 methods » 5 methoxy (Expandir a Pesquisa)
null daf » null a (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (Expandir a Pesquisa), upon net (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 l combs con net ) or ((( 5 methods comparison tried ngoc ) or ( 3 null daf carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combs con net ) OR ((( 5 methods comparison tried ngoc ) OR ( 3 null daf carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs con net ) or ((( 5 methods comparison tried ngoc ) or ( 3 null daf carlos nejar ))))*.