Hook that act on a field being inserted or updated? I've Created a VBO view to "Modify entity values" .It's working fine. I need to perform an action when particular entity field gets inserted/updated.

So far I've tried hook_field_update,hook_field_storage_write, hook_field_insert, hook_field_presave. None of them are working

Any suggestions?
Why not use a hook_entity_update()? This hook gets triggered as soon as an entity gets updated. Inside the hook you should include some logic with respect to your field.