Meaning of BEHIND in English
BAD : At night I keep my wallet behind my pillow.
GOOD : At night I keep my wallet under my pillow.
behind = at the back of something: 'Lizzie ran and hid behind a tree.'
under (or beneath / underneath ) = directly below something, and sometimes touching or covered by it: 'Come and stand under my umbrella.' 'I eventually found the letter under a pile of old newspapers.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012