Talvez deva tentar algumas variações de ortografia:
plc programming » c programming (Expandir a busca), block programming (Expandir a busca), _ programming (Expandir a busca)
coder sampling » under sampling (Expandir a busca), over sampling (Expandir a busca), core sampling (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
sampling plc » sampling plan (Expandir a busca), sampling plans (Expandir a busca), sampling plots (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 sampling plc programming ) OR ( api python python python programming ))~.