Talvez deva tentar algumas variações de ortografia:
estimation algorithms » optimization algorithms (Expandir a busca), optimization algorithm (Expandir a busca), approximation algorithms (Expandir a busca)
spectral estimation » section estimation (Expandir a busca), neural estimation (Expandir a busca)
method computation » network computation (Expandir a busca), the computation (Expandir a busca), method simulation (Expandir a busca)
problems method » probe method (Expandir a busca), problemas metodos (Expandir a busca), problems without (Expandir a busca)
algorithms in » algorithms and (Expandir a busca), algorithms _ (Expandir a busca), algorithm _ (Expandir a busca)
in elasticity » and elasticity (Expandir a busca), of elasticity (Expandir a busca), soil elasticity (Expandir a busca)
and spectral » and special (Expandir a busca), and spectrum (Expandir a busca)
routine and » routines and (Expandir a busca), routing and (Expandir a busca), routine care (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Caso esteja tentando utilizar os operadores booleanos, deve escrevê-los em Letras MAIÚSCULAS: routine AND spectral estimation algorithms in elasticity problems method computation~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: routine and spectral estimation algorithms in elasticity problems method computation*.