When applying for a Temporary Resident Visa (TRV), you have to ensure the appropriate documentation and explanations are submitted. You have to provide adequate information regarding family ties, employment, travel history, reason for visit and more.
It is important to provide a strong application at the onset. IRCC officers do not send additional document requests for temporary applications. If the reviewing immigration officer feels that the documentation and explanation provided by you is not adequate, they will refuse your case.
Once you have a previous refusal, getting an approval becomes harder going forward.