I found this on the CIC website
"It is common for students who have completed their studies and are holders of post-graduation work permits to wish to return to their home countries for a visit prior to seeking or starting employment in Canada. These students may need to apply for a TRV to be able to return to Canada. Consideration should be given to the issuance of a long-term, multiple-entry TRV that would cover the validity period of the post-graduation work permit plus a 90-day bridging period. The student has already demonstrated bona fides through successful studies in Canada and receipt of the post-graduation work permit. Whether the student has obtained a job offer or started a job search for the post-graduation work period should not be the only determining factor for the issuance of the TRV."
Hope it helps
