Talvez deva tentar algumas variações de ortografia:
operations problems » operational problems (Expandir a busca), vibration problems (Expandir a busca), situations problems (Expandir a busca)
coder decoder » encoder decoder (Expandir a busca), video decoder (Expandir a busca)
in operations » and operations (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
decoder in » recorder in (Expandir a busca), decoder _ (Expandir a busca), decoder using (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder decoder in operations problems ) OR ( api python python python programming ))~.