Talvez deva tentar algumas variações de ortografia:
formation problem » deformation problems (Expandir a busca), information problems (Expandir a busca), location problem (Expandir a busca)
string formation » starting formation (Expandir a busca), springs formation (Expandir a busca), ring formation (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder string » cordel string (Expandir a busca), closed string (Expandir a busca), modelo string (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)
in python » _ python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder string formation problem ) OR ( in python python python programming ))~.