The Internet Assigned Numbers Authority (IANA) assigns two-letter codes for country-coded top-level domains in Internet addresses. (See link to full country code list below.) These codes follow the ISO 2-alpha codes assigned by the International Organization for Standardization (ISO) under its standard ISO 3166 in nearly all cases.
To do a targeted search for websites from a certain country: type in site:, followed by the two-letter IANA country code before your search term
Sample search for websites from the Democratic People's Republic of Korea (North Korea) or the Republic of Korea (South Korea) with information on Talchum: site:kp talchum or site:kr talchum