Talvez deva tentar algumas variações de ortografia:
protocol problems » protocols problems (Expandir a busca), protocol problem (Expandir a busca), practical problems (Expandir a busca)
program protocol » program procel (Expandir a busca), program proposal (Expandir a busca), program project (Expandir a busca)
coder program » cooper program (Expandir a busca), proder program (Expandir a busca), closer program (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)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder program protocol problems ) OR ( _ python python python programming ))~.