Talvez deva tentar algumas variações de ortografia:
decrease frontier » decrease further (Expandir a busca)
frontier object » frontier objects (Expandir a busca), frontier context (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 il » decreased il (Expandir a busca), decrease hiv (Expandir a busca), decrease of (Expandir a busca)
il decrease » l decrease (Expandir a busca), will decrease (Expandir a busca), oil decreases (Expandir a busca)
in decrease » in decreased (Expandir a busca), on decrease (Expandir a busca), pain decrease (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease their decrease il decrease ) OR ( decrease in decrease frontier object ))~.