Buy I didn't submit any of my funds in the applications.. only I submit copy of US visa+ national ID+ marriage certificate
In your point of view how can I pass next time ?
Reduce the days ? Mention that I will travel to US after canada?
Well, a visitor visa asks you basic information : like highest education, job title, employer and in different form, family details. These days, they feed this information into something called as Chinook. Now Chinook is a software that can do basic statistical analysis and using averages and past data about the kind of profile you present of yourself (job, family size, education etc), it flags how likely you are to overstay or seek employment. It basically compares you to an average applicant of your profile.
Is it accurate? Not always. Is it fair? I doubt it. But it lets them group applications into risk class. Higher risk, low risk and so on. Higher risk is reviewed by a human VO and is often denied. To mitigate this denial you need to present more evidence for why you want to visit Canada as a tourist, why will you leave Canada and why you will not seek work here illegally. Basically, to tell VO reviewing your case that Chinook is mistaken about you.
What can mitigate this risk?
Your income and savings, if they are consistent with your visit.
Your immigration past, ie if in past you visited countries that share information with Canada (US, UK, Australia, New Zealand). Its not future, its past.
Your motivations for this visit. Why are you taking a solo / family trip to Canada which is costing 1000 dollars per person in just airfare? If you can give good enough reasons for this.
I can give you an example of my parents who visited Canada from India. They
1. Are retired and wanted to visit me to be with me during child birth of my son. (Thats the motivation part, it was a family reunion).
2. recieve about 2000 dollars a month in pension. They have substential savings in cash ( running in several 100K CAD ). I (their son and residing in Canada) also gave a letter of support with one of my bank statement, several 100Ks CDN in cash to support their visit.
3. We also included their medical insurance information during their visit here.
They stayed with us for six months in first visit and one and a half year in second visit.
You also need to build up your motivation and means to afford this trip for a successful visa outcome.