Hello,
I want to come to Canada on a six months visiting visa, can i get my stay before that six months expire or it won't be possible? If possible, how easy is it to get job in Canada? Your sincere advise means alot .

Thanks.

It won't be possible. Google the Canadian immigration website and look for the link to processing times for different visa offices around the world. All times listed are greater than 6 months.

To get a job in Canada, you will be required to have a work permit. Then to get the work permit, you will be required to get a job, so it is a tricky situation. If you would really love to move to canada, there are other ways.
Visit the link below to read about visiting working and migrating to canada.