Talvez deva tentar algumas variações de ortografia:
estimation algorithms » optimization algorithms (Expandir a busca), distribution algorithms (Expandir a busca), optimization algorithm (Expandir a busca)
spectrum estimation » spectrum optimization (Expandir a busca), section estimation (Expandir a busca), spectrum simulation (Expandir a busca)
network computation » networks computation (Expandir a busca), network population (Expandir a busca), network composition (Expandir a busca)
algorithms and » algorithms _ (Expandir a busca)
activity task » activity risk (Expandir a busca), activity base (Expandir a busca), activity based (Expandir a busca)
and activity » abc activity (Expandir a busca), and activism (Expandir a busca), and affectivity (Expandir a busca)
task network » tank network (Expandir a busca), based network (Expandir a busca), stork network (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Fazer uma busca fuzzy pode resultar em termos de grafias semelhantes: routine AND spectrum estimation algorithms and activity task network computation~.
• Caso esteja tentando utilizar os operadores booleanos, deve escrevê-los em Letras MAIÚSCULAS: routine AND spectrum estimation algorithms AND activity task network computation.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "routine AND spectrum estimation algorithms and activity task network computation".
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: routine AND spectrum estimation algorithms and activity task network computation*.