Talvez deva tentar algumas variações de ortografia:
optimization algorithms » approximation algorithms (Expandir a busca)
spectrum optimization » selection optimization (Expandir a busca), swarm optimization (Expandir a busca), vector optimization (Expandir a busca)
elasticity predictive » elasticity price (Expandir a busca)
predictive method » predictive methods (Expandir a busca), prediction method (Expandir a busca), prediction methods (Expandir a busca)
method simulation » method simplification (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)
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 spectrum optimization algorithms in elasticity predictive method simulation~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: routine and spectrum optimization algorithms in elasticity predictive method simulation*.