Talvez deva tentar algumas variações de ortografia:
improved programming » improve programming (Expandir a busca), imperative programming (Expandir a busca), mixed programming (Expandir a busca)
butter improved » under improved (Expandir a busca), winter improved (Expandir a busca), between improved (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder butter » cocoa butter (Expandir a busca), cake butter (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder butter improved programming ) OR ( api python python python programming ))~.