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Some suggestions:
Don't overuse subfigure environments. I suggest that you replace the first subfigure environment with a minipage environment and that you leave off the second "outer" subfigure code entirely.
Create some vertical separation between Figure 1 and Figure 2 (a,b,c) complex with a \vspace instruction.
Maximize the horizontal separation between ...
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solved the problem.
just rotate the PDF on the pc and then this post should help you:
Formatting figure captions overlayed with TikZ
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