If notice of 15 day to terminate has been given to commercial tenant,
Is there any way the tenant could be allowed to stay. The tenant has defaulted
On several issues in the lease and landlord does not want tenant to stay.

The Tenant can BUY the property off the landlord then do whatever they want if its legal (assuming the landlord would sell it to them at any price). But being in breach of a number of points in a lease... the tenant better be making plans to relocate because its going to happen. Not exactly in 15 days...but once it goes to court which might not be much longer than that.

It's going to depend upon the law of whichever state or country you are in. As you may know, for a residential tenancy a landlord has to give written notice so many days in advance, before an eviction action can be filed. Whether it's 15 days or some other period depends upon local (i.e.: state or other jurisdictional) law.

And since it is a commercial lease it may be different as well.

The penalties for default or breach of the lease should be spelled out in the lease (unlike with residential leases). The eviction process should also be spelled out.

If you have sufficient proof of the breaches, then the court should issue the eviction order.