Talvez deva tentar algumas variações de ortografia:
modulation changes » population changes (Expandir a busca), modulation channel (Expandir a busca), population change (Expandir a busca)
code modulation » the modulation (Expandir a busca), and modulation (Expandir a busca), fde modulations (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)
coder code » code code (Expandir a busca), modern code (Expandir a busca), color code (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder code modulation changes ) OR ( api python python python programming ))~.