Find and Replace on PowerPoint Charts with Excel Sheets
This is pretty well optimized. All I can say is that some variables could have better names

pptPres - targetPresentation
sld - targetSlide
shpe - targetShape
c - targetChartObject
sht - targetSheet
fndList - wordsToFind


Otherwise, like I said, there's nothing I can really say need to be optimized.

If you don't have to change the window viewtype and activate the chart data, I'd get rid of those.