Talvez deva tentar algumas variações de ortografia:
approximative algorithms » approximation algorithms (Expandir a busca), proximal algorithms (Expandir a busca)
functions approximative » function approximation (Expandir a busca), functional approximation (Expandir a busca)
elasticity theory » activity theory (Expandir a busca)
and functions » and function (Expandir a busca), and functional (Expandir a busca), of functions (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)
theory python » the python (Expandir a busca), theory method (Expandir a busca)
route and » routes and (Expandir a busca), routine and (Expandir a busca), acute and (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: route AND functions approximative algorithms in elasticity theory python computer~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: route and functions approximative algorithms in elasticity theory python computer*.