I know there have been some previous posts about selective shapening and also some third party tools that can help. Have you tried to search?
Not sure what app you using, but in Photoshop the sharpening filter/tool could go a long way in correcting this photo. Either in whole, or selectively. I'd recommend starting with a full image correction of smaller magnitude. Select the entire image (ctrl-a) or use the marquee tool and then use the sharpen filter. You can try the presets or variable. Play with the settings until you get something you like. Cautious as you'll notice on the variable setting, or repeated filtering you'll develop noise and quality issues.
To be more selective, just use your marquee tools to select the specific areas you want to sharpen and once selected use the same sharpening filter approach above for each selection.
In the toolbox there is a "sharpening" tool, but things can get out of hand quickly using this tool. It is a nice tool to use for minor touchups once general sharpening is already done.
Good luck, JK