Talvez deva tentar algumas variações de ortografia:
vpython collisions » vpython colisoes (Expandir a busca), proton collisions (Expandir a busca), photon collisions (Expandir a busca)
disease processes » disease process (Expandir a busca), disease progress (Expandir a busca), these processes (Expandir a busca)
decrease disease » decreases disease (Expandir a busca), increase disease (Expandir a busca), increased disease (Expandir a busca)
collisions lib » collisions in (Expandir a busca), collisions via (Expandir a busca), collisions i (Expandir a busca)
decrease by » decreased by (Expandir a busca), decrease in (Expandir a busca), decrease of (Expandir a busca)
by decrease » by decreased (Expandir a busca), may decrease (Expandir a busca), any decrease (Expandir a busca)
lib python » in python (Expandir a busca), via python (Expandir a busca), logic python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease by decrease disease processes ) OR ( vpython collisions lib python programming ))~.