Talvez deva tentar algumas variações de ortografia:
friction angle » friction and (Expandir a busca)
angle decrease » ankle decreases (Expandir a busca), and decrease (Expandir a busca), any decrease (Expandir a busca)
code friction » side friction (Expandir a busca), cost friction (Expandir a busca), trade friction (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)

Você pode obter mais resultados ajustando o argumento de busca.

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