views_embed_view fails with contextual filters?
If you have devel installed , try checking with this syntax , if you do not see any result then try passing the arguments as 4/1(w.r.t given example) in the preview of views to cross check you have results with those combination of exposed filters.
Debugging at devel/php will save lots of your time.

dpm(views_embed_view("view_name", "view_display_type", 4, 1));