But I need to work in Canada it's my dream country applying for visiting visa what documents is required haven't applied so far plz help me
So focus on immigration programs like Express Entry based on your age, education, skilled work experience, language and funds.
A TRV lets you come to Canada to visit not work. There are not jobs here. You need a job offer and your employer needs to file for and pay $1k for a LMIA. The LMIA shows that no Canadian or PR could be hired, only you. Then with LMIA, you apply for a closed work permit. For the permit, you show that you are experienced to do the job. Depending on the job requirements, you may need IELTS for language and ECA for education. Most if not all jobs posted will say that you must be a citizen, PR or a person with work authorization to apply so no point in applying for those jobs.