Can anyone please explain to me what are useful ways to do SEO work for a specific country in a website to get high rankings in the keywords?
Why don't you just target the desired country through your Google Webmasters tool account??!! It will be a first step to start with.
You have to practice local SEO techniques for promoting your business and website to a specific country.
Use your target audience’s language through-out your site
Get backlinks from other websites in your target county.
Register your business on Google Places
You have to practice local seo techniques by listing on google business listing we can target certain country through web master tools.
you can also use country based top level domain.