How long hash get away from my blood?

As above: It depends how much and how often u have smoked it

Depends: Depends on how potent the hashish is, how much you smoke, your body type (fat stores thc), and individual factors like how well your kidneys work. A paper i found suggested that after a high potency cigarettes were smoked a urine test could stay positive for as long as 78 hours if federal guidelines were followed. More frequent use of higher potency hashish would probably be even longer!