Hi Chukku,
You can stay outside the country for more than six months provided your sponsor ( your case your husband, if you are holding dependant visa ) seek the permission of the authorities concerned either in advance or later by paying a fee. This, provided that when you come back your RP is valid for at least 60 days.
Just you need to pay Qr.500/- for each applicant who wishes to stay more than 6 months. This should be done early to their departures from
doha, you can go to concerned immigration office where you got issued your visa and fill the application.
Better to do this before leaving country, but your sponsor can also do this before finishing that 6 months period.You can extent it up to one year ,provided that when you come back your RP is valid for at least 60 days.
Just ask your
PR he should guide you regarding this.
Luv,
Lini..