Upgrading a laptop CPU is rarely a viable idea. It can be soldered to the board (so near impossible), or unlikely to be viable from a cost standpoint.
Occassionally, it's possible - but laptops have limited BIOS support, and limited cooling capacity.
The best you can (generally) do, in the cases you can actually upgrade - is to CPUs that were supported in the model line at stock (and therefore, has BIOS support).
Your laptop has an A8-6410, unless I"m mistaken.
As per HP's website, the laptop model was available with:
2 GHz, up to 2.4 GHz AMD Quad-Core A8-6410 APU with Radeon R5 Graphics
Therefore, what you have is already the 'best' available...... assuming it's even possible to upgrade...