Talvez deva tentar algumas variações de ortografia:
activation mechanisms » activation mechanism (Expandir a busca), action mechanisms (Expandir a busca), radiation mechanisms (Expandir a busca)
python activation » method activation (Expandir a busca), proton activation (Expandir a busca), neutron activation (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (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)
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 python activation mechanisms ) OR ( in python python python programming ))~.