Talvez deva tentar algumas variações de ortografia:
increase risk » increased risk (Expandir a busca)
decrease toc » decrease of (Expandir a busca), decrease the (Expandir a busca), decreased to (Expandir a busca)
toc decrease » to decrease (Expandir a busca), the decrease (Expandir a busca), not decrease (Expandir a busca)
risk objects » risk subjects (Expandir a busca), disk object (Expandir a busca), first objects (Expandir a busca)
decrease by » decreased by (Expandir a busca), decrease in (Expandir a busca), decrease of (Expandir a busca)
by increase » by increased (Expandir a busca), by incresased (Expandir a busca), may increase (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease NOT decrease toc decrease ) OR ( decrease by increase risk objects ))~.