Thank you for advice.
I have raised CSE 2 months ago and received a standard reply from SVO:
Dear....
Thank you for your enquiry to the Immigration Section of the High Commission of Canada in Singapore.
The application is currently under review. Once the review has taken place, if any further documentation or information is required before a decision can be made on the application, our office will contact the applicants directly. Until the review has been completed, we will not be able to provide any further information. Please wait to be contacted by our office.
We hope this information will be of assistance.
Sincerely,
So I don't know if I should raise CSE one more time or be patient in hope