Talvez deva tentar algumas variações de ortografia:
between professions » between professionals (Expandir a busca), between professional (Expandir a busca), between professors (Expandir a busca)
decrease between » increase between (Expandir a busca), decree between (Expandir a busca), disease between (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 of » decrease in (Expandir a busca)
of decrease » or decrease (Expandir a busca), not decrease (Expandir a busca), to 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 between professions ) OR ( decrease of decrease of decrease ))~.