Talvez deva tentar algumas variações de ortografia:
purchase program » purchase process (Expandir a busca)
computations in » computation in (Expandir a busca), computation of (Expandir a busca), computation and (Expandir a busca)
stacking method » stocking method (Expandir a busca), staking method (Expandir a busca), stocking methods (Expandir a busca)
method python » method method (Expandir a busca), python python (Expandir a busca)
in purchase » on purchase (Expandir a busca), and purchase (Expandir a busca), to purchase (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( AND computations in purchase program ) OR ( using stacking method python programming ))*.