There are no countries with the government of an oligarchy today. Some argue many Western European countries are, but in reality they are not.
united states
Japan was an oligarchy in the Meiji period that lasted until 1912.
Burma has a junta government. That is a form of oligarchy.
which people have formed an economic oligarchy in several latin American countries
some countries
No countries now are under an Oligarchy but in the past, Russia (BC) and Etruscans (BC).
china
Asia is a continent not a country. Each country in Asia has it's own form of government, some are democracies, some are dictatorships. MYANMAR
veitnam
There are no countries in Europe or the world who have an oligarch government. The oligarchy was created in Ancient Greece and it is a rule by a small group of people, usually the wealthiest.
Oligraphic is not a word. Perhaps you mean oligarch countries, which are countries that have an oligarchy. An oligarchy is rule by a select few individuals (of which are most likely the most wealthy). No countries today are oligarchies. Oligarchies were present in Ancient Greece.