Talvez deva tentar algumas variações de ortografia:
decrease burden » disease burden (Expandir a busca), decrease further (Expandir a busca)
ratio decrease » rate decrease (Expandir a busca), rapid decrease (Expandir a busca), ratio increase (Expandir a busca)
decrease ratio » decreased ratio (Expandir a busca), decrease at (Expandir a busca), decreased rate (Expandir a busca)
burden objects » buried objects (Expandir a busca), wooden objects (Expandir a busca), golden objects (Expandir a busca)
decrease pain » decreases pain (Expandir a busca), decrease in (Expandir a busca), decreased brain (Expandir a busca)
pain decrease » can decrease (Expandir a busca), taping decrease (Expandir a busca), strain decrease (Expandir a busca)
decrease to » decreased to (Expandir a busca), decrease toc (Expandir a busca), decrease the (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease pain decrease to decrease ) OR ( decrease ratio decrease burden objects ))~.