Talvez deva tentar algumas variações de ortografia:
python programming » math programming (Expandir a busca)
functions green » functions graph (Expandir a busca), functions between (Expandir a busca), functions kernel (Expandir a busca)
programming on » programming of (Expandir a busca), programming in (Expandir a busca), programming and (Expandir a busca)
hash functions » basis functions (Expandir a busca), and functions (Expandir a busca), cost functions (Expandir a busca)
green function » green's function (Expandir a busca), green's functions (Expandir a busca)
algorithm and » algorithms and (Expandir a busca), algorithm _ (Expandir a busca)
on algorithm » an algorithm (Expandir a busca), and algorithm (Expandir a busca), ant algorithm (Expandir a busca)
and hash » and high (Expandir a busca), and his (Expandir a busca), and hard (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: _ python programming on algorithm AND hash functions green function~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: _ python programming on algorithm and hash functions green function*.