Talvez deva tentar algumas variações de ortografia:
diffraction htxrd » diffraction hrxrd (Expandir a busca), diffraction xrd (Expandir a busca), diffraction pxrd (Expandir a busca)
code diffraction » powder diffraction (Expandir a busca), wedge diffraction (Expandir a busca), wave diffraction (Expandir a busca)
htxrd decrease » term decrease (Expandir a busca), atxn2 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 htxrd decrease ) OR ( in python python python programming ))~.