To search an expression, simply put quotation marks around it.Example: A search for "1 franc" is more precise than 1 franc.
You may use an asterisk as a wildcard.Example: type "5 cent*" to find coins of 5 cents and 5 centimes.
Use a dash to exclude the coins matching with a word or expression.Example: Martin Luther -King
Tannu Tuva was an independent state between Mongolia and the USSR which existed from 1921 to 1941. It was recognised only by its neighbouring countries, with the rest of the world considering it a part of the Soviet Union. Wikidata: Q816709
See also: Soviet Union, Russia