Talvez deva tentar algumas variações de ortografia:
decrease purchase » lease purchase (Expandir a busca), declared purchase (Expandir a busca), decrease sucrose (Expandir a busca)
purchase program » purchase process (Expandir a busca)
action during » actions during (Expandir a busca), function during (Expandir a busca), activation during (Expandir a busca)
during python » using python (Expandir a busca), during pathogen (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
in decrease » in decreased (Expandir a busca), on decrease (Expandir a busca), pain decrease (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease in decrease purchase program ) OR ( action during python python programming ))~.