Talvez deva tentar algumas variações de ortografia:
coder obstacle » over obstacle (Expandir a busca), border obstacles (Expandir a busca), convex obstacle (Expandir a busca)
c programming » _ programming (Expandir a busca), cone programming (Expandir a busca), and programming (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)
obstacle c » obstacle _ (Expandir a busca), obstacle to (Expandir a busca), obstacles _ (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 obstacle c programming ) OR ( in python python python programming ))~.