Anyone any solution how to achieve it?
I don't think anyone has answered because it is very unclear what you are after. Also is this proprietary information? I'd be really careful about showing that here. I'm going to take a stab at what you are after.
By asserting you want two charts in a single view, the way that Tableau uses multiple charts/graphics/crosstabs/etc into a view is with dashboards. You can create a new dashboard in two ways.
1) On the very bottom of your current view where you see your two named worksheets to the right of these there is an option to create a new sheet, a new dashboard, and a new story.
2) On the menu bar at the top of the entire Tableau Window, if you select the one labeled Dashboard and then choose 'new dashboard'.
Once in this dashboard interface you will have the option to drag the sheet's you've already created into a view. Thus two sheets/ two charts in the same view.