look into
US /lʊk ˈɪntuː/
UK /lʊk ˈɪntuː/

1.
enquêter sur, examiner
to investigate or examine something, especially a problem or a complaint
:
•
The police are going to look into the matter.
La police va enquêter sur l'affaire.
•
We need to look into why sales have dropped.
Nous devons examiner pourquoi les ventes ont chuté.