Talvez deva tentar algumas variações de ortografia:
diffraction studies » interaction studies (Expandir a busca)
notes diffraction » new diffraction (Expandir a busca), non diffraction (Expandir a busca), systems diffraction (Expandir a busca)
studies decrease » statins decrease (Expandir a busca), strains decrease (Expandir a busca), species decrease (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
code notes » corde notes (Expandir a busca), coffe notes (Expandir a busca), some notes (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( code notes diffraction studies decrease ) OR ( _ python python python programming ))~.