This is what I quoted from CIC:
"If you are a citizen of a country that requires a temporary resident visa (TRV) to travel to Canada, you will also need to be in possession of a valid entry visa to return, unless:
* you are returning to Canada following a visit only to the United States or St-Pierre and Miquelon; and
* you return before the expiry of the period initially authorized for your entry or any extension to it, either as a visitor, student or worker.
"(http://www.cic.gc.ca/english/applications/guides/5552E2.html#wp1020642)
Therefore, you don't need Canadian re-entry VISA.
You can save a lot of time if you could search information online by yourself.
