Hi Farzan,
The operation "Solid From Intersections" tries to obtain a solid "water-tight" geometry from the combination of several provided geometries.
The reason why the operation provided some unsatisfactory result maybe due to your provided inputs were not much intersecting but flush maybe?
From the pictures it is not quite clear but is there even some fillet?
I will recommend you to extend the blade geometries a bit so that there can be a proper intersection among the geometries and create the fillet afterwards as a separate operation.
Please let me know if you need further assistance.
Cheers
Ceyhan