Talvez deva tentar algumas variações de ortografia:
decreased ratio » decreased rate (Expandir a busca), decreased native (Expandir a busca), decreased rankl (Expandir a busca)
ratio decrease » rate decrease (Expandir a busca), rapid decrease (Expandir a busca), ratio increase (Expandir a busca)
decrease and » decreases and (Expandir a busca), decrease in (Expandir a busca), decrease the (Expandir a busca)
and decrease » and decreases (Expandir a busca), and decreased (Expandir a busca), and increase (Expandir a busca)
decrease of » decrease in (Expandir a busca)
of decrease » or decrease (Expandir a busca), not decrease (Expandir a busca), to decrease (Expandir a busca)
and objects » and object (Expandir a busca), and subjects (Expandir a busca), and objectives (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decreased ratio decrease and decrease ) OR ( decrease of decrease and objects ))~.