Talvez deva tentar algumas variações de ortografia:
estimation algorithms » optimization algorithms (Expandir a busca), distribution algorithms (Expandir a busca), optimization algorithm (Expandir a busca)
optimal estimation » optimal designation (Expandir a busca), optimal taxation (Expandir a busca), arrival estimation (Expandir a busca)
elasticity theory » activity theory (Expandir a busca)
algorithms and » algorithms _ (Expandir a busca)
and elasticity » and plasticity (Expandir a busca), and electricity (Expandir a busca), of elasticity (Expandir a busca)
routine space » routine search (Expandir a busca), routine care (Expandir a busca), productive space (Expandir a busca)
space optimal » space optics (Expandir a busca), path optimal (Expandir a busca), space spatial (Expandir a busca)
theory python » the python (Expandir a busca), theory method (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 space optimal estimation algorithms AND elasticity theory python computer~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: routine space optimal estimation algorithms and elasticity theory python computer*.