Talvez deva tentar algumas variações de ortografia:
decrease observed » decay observed (Expandir a busca), case observed (Expandir a busca)
observed objects » observed effects (Expandir a busca), submerged objects (Expandir a busca), buried objects (Expandir a busca)
decrease their » decrease the (Expandir a busca), increase their (Expandir a busca), decreases the (Expandir a busca)
their decrease » the decrease (Expandir a busca), their disease (Expandir a busca), the decreased (Expandir a busca)
decrease with » decreases with (Expandir a busca), increase with (Expandir a busca), decrease in (Expandir a busca)
with decrease » with decreased (Expandir a busca), with deceased (Expandir a busca), with increase (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease their decrease with decrease ) OR ( decrease AND decrease observed objects ))~.