Talvez deva tentar algumas variações de ortografia:
period programming » end programming (Expandir a busca), learning programming (Expandir a busca)
pathogen python » python python (Expandir a busca)
python period » action period (Expandir a busca)
root pathogen » root pathogens (Expandir a busca), host pathogen (Expandir a busca), of pathogen (Expandir a busca)
coder python » codigo python (Expandir a busca), compra python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)
python root » python tools (Expandir a busca), pythium root (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder python period programming ) OR ( python root pathogen python programming ))~.