Talvez deva tentar algumas variações de ortografia:
diffraction speed » diffraction leed (Expandir a busca), diffraction ped (Expandir a busca), direction speed (Expandir a busca)
code diffraction » powder diffraction (Expandir a busca), wedge diffraction (Expandir a busca), wave diffraction (Expandir a busca)
speed decrease » speed decreases (Expandir a busca), spread decreased (Expandir a busca), stent decrease (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
code code » code cdc (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: (( code code diffraction speed decrease ) OR ( in python python python programming ))~.