Offences detectives are investigating include armed robbery, indecent images of children, fraud and assaults.
In one shocking incident two masked robbers armed with knives threatened staff at a Creswell store.
While in another case three different people were assaulted by a male at two different late-night bars in Chesterfield.
Anyone with information which could help locate the individuals should contact police by phoning 101.
While in another case three different people were assaulted by a male at two different late-night bars in Chesterfield.