to find the real cause of a problem
найти настоящую причину проблемы (vyyasnit nastoyashchuyu prichinu chego-libo)
"The manager promised to get to the bottom of the issue."
"Менеджер пообещал найти корень проблемы." (Menedzher khochet vyyasnit nastoyashchuyu prichinu problemy.)
to open your books and begin studying
done secretly or dishonestly, often involving money
authority or people managing a situation
something that is very easy to understand or decide
a process has started and is making progress
someone or something that brings great happiness